Symmetristen komponenttien mallinnus

Tässä insinöörityössä suunniteltiin Helsingin ammattikorkeakoululle jakeluverkoissa tapahtuvien oikosulkujen symmetristen komponenttien laskutavan havainnollistamiseen sopiva sijaiskytkentä. Sijaiskytkennässä tärkeitä huomioitavia asioita olivat mm. jännitetaso, havainnollistavien muuntajien oikosulkukestoisuus, jatkokäyttö laboratoriotyönä ja yleinen havainnollistavuus. Työssä on aluksi perehdytty symmetristen komponenttien ja jakeluverkoissa tapahtuvien oikosulkujen teoriaan. Tämän jälkeen mitoitettiin tarvittavan kytkennän komponenttien jännite- ja virtakestoisuudet mahdolliset lisäkäytöt huomioiden. Näiden rajoitusten mukaan perusteella työtä ruvettiin toteuttamaan. Työssä tilattiin sähkön 40 V:n pääjännitetasolle alentava muuntaja syöttämään oikosulun kestävää muuntajaa, jolla simuloitiin jakeluverkon yleisimpiä vikatyyppejä. Jälkimmäiselle muuntajalle mitoitettiin ja hankittiin sisäistä impedanssia vastaava induktanssi. Tämän avulla rakennettiin kokonaisuus, jonka avulla voidaan simuloida kaikkia tapahtuvia oikosulkuja vastaavat sijaiskytkennät. Työhön jätettiin kehittämisvaraa ja muita laboratoriotyön rakentamismahdollisuuksia tulevien insinööritöiden tekijöille.

Yksittäistuotannon ohjattavuusanalyysi

Tässä työssä tutkitaan Merima Oy:n tuotantolaitoksen toimintaa ohjattavuusanalyysillä. Työn tarkoituksena on etsiä potentiaalisia kehityskohteita yrityksen tuotannosta. Yrityksen tuotanto on muutospaineessa ja se tarvitsee kvantitatiivista informaatiota kehityksen suunnannäyttäjäksi. Työ aloitettiin jalostamalla yrityksen tuotannonohjausjärjestelmästä saatava data analysoitavaan muotoon. Tämän jälkeen päätettiin analyysityypeistä, joita työssä käytetään. Analyysivaiheessa jalostettu data saatettiin informoivaan muotoon, jonka jälkeen voitiin analysoida tuloksia ja tehdä johtopäätöksiä. Työn tuloksena saadaan joukko kehityskohteita, joihin kehityspanos tulisi fokusoida. Lisäksi raportin lopussa pohditaan keinoja kehityskohteiden parantamiseksi.

ACS800-kaappimoduulien pakkaamon ulkoistaminen

Tässä insinöörityössä selvitetään ABB Oy System AC -liiketoimintayksikön pakkaamon ulkoistamiseen liittyviä ongelmia sekä mahdollisia ratkaisuja näihin ongelmiin. Koko ongelman käsittely on liian laaja projektin yhdelle insinöörityölle. Tässä työssä keskitytään ratkaisemaan ko. ulkoistamiseen liittyvät keskeisimmät ACS800-kaappimoduulien kuljetuslogistiset ongelmat. Näitä ongelmia ovat kaappimoduulien kiinnitystarve kuljetusalustaansa sekä kuljetuspaketoinnin puuttuessa kaappimoduulien suojaaminen maantiekuljetuksen ajaksi. Työssä on otettu huomioon viranomaisten maantiekuljetuksia koskevat vaatimukset. Työssä on suunniteltu uusia kiinnitysvälineitä sekä muutoksia olemassa oleviin kuljetusalustoihin, joita käytetään tehtaan sisäisissä kaappimoduulien siirroissa. Kiinnitysvälineistä on tehty lujuuslaskelmia ja määritelty kiristysmomentteja. Tuotettavuuden ja kustannustehokkuuden kannalta on selvitetty kiinnitysvälineisiin soveltuvia materiaalivaihtoehtoja. Kuljetusalustojen muutoksista on myös tehty ohjeistusta. Tämän työn tulos on uusien kiinnitysvälineiden ja kuljetusalustojen mekaanisten muutosten suunnittelu. Samalla on todistettu, että kaappimoduulien siirto tehtaan ulkopuoliseen pakkaamoon ilman kuljetuspaketointia on teoriassa mahdollista.

User-driven community-based service development

This final thesis project was carried out in the Industrial Management department of University of Applied Sciences Stadia for Forum Virium Helsinki. The purpose of this study was to answer to the question of how companies can use online customer community of co-creation in service development and what is the value gained from it. The paper combines a range of recently published theoretical works and ongoing customer community case development. The study aims to provide new information and action approaches to new service developers that may increase the success of the community building process. The paper also outlines the benefits of the use of online customer community and offers practical suggestions for maximizing the value gained from the community in service development projects. The concepts and suggestions introduced in the study appear to have notable new possibilities to the service development process but they have to be further tested empirically. This paper describes the online consumer community of co-creation to an important organizational process of innovation management suggesting that it possesses a great value to business. Online customer communities offer a potential of improving the success of new services or products enabling early, penetrable market entry and creating sustainable competitive advantage.

Pressure filtration characteristics of enzymatically hydrolyzed biomass suspensions

Enzymatic hydrolysis of lignocellulosic polymers is likely to become one of the key technologies enabling industrial production of liquid biofuels and chemicals from lignocellulosic biomass. Certain types of enzymes are able to hydrolyze cellulose and hemicellulose polymers to shorter units and finally to sugar monomers. These monomeric sugars are environmentally acceptable carbon sources for the production of liquid biofuels, such as bioethanol, and other chemicals, such as organic acids. Liquid biofuels in particular have been shown to contribute to the reduction of net emissions of greenhouse gases. The solid residue of enzymatic hydrolysis is composed mainly of lignin and partially degraded fibers, while the liquid phase contains the produced sugars. It is usually necessary to separate these two phases at some point after the hydrolysis stage. Pressure filtration is an efficient technique for this separation. Solid-liquid separation of biomass suspensions is difficult, because biomass solids are able to retain high amounts of water, which cannot be readily liberated by mechanical separation techniques. Most importantly, the filter cakes formed from biomaterials are compressible, which ultimately means that the separation may not be much improved by increasing the filtration pressure. The use of filter aids can therefore facilitate the filtration significantly. On the other hand, the upstream process conditions have a major influence on the filtration process. This thesis investigates how enzymatic hydrolysis and related process conditions affect the filtration properties of a cardboard suspension. The experimental work consists of pressure filtration and characterization of hydrolysates. The study provides novel information about both issues, as the relationship between enzymatic hydrolysis conditions and subsequent filtration properties has so far not been considered in academic studies. The results of the work reveal that the final degree of hydrolysis is an important factor in the filtration stage. High hydrolysis yield generally increases the average specific cake resistance. Mixing during the hydrolysis stage resulted in undefined changes in the physical properties of the solid residue, causing a high filtration resistance when the mixing intensity was high. Theoretical processing of the mixing data led to an interesting observation: the average specific cake resistance was observed to be linearly proportional to the mixer shear stress. Another finding worth attention is that the size distributions of the solids did not change very dramatically during enzymatic hydrolysis. There was an observable size reduction during the first couple of hours, but after that the size reduction was minimal. Similarly, the size distribution of the suspended solids remained almost constant when the hydrolyzed suspension was subjected to intensive mixing. It was also found that the average specific cake resistance was successfully reduced by the use of filter aids. This reduction depended on the method of how the filter aids were applied. In order to obtain high filtration capacity, it is recommended to use the body feed mode, i.e. to mix the filter aid with the slurry prior to filtration. Regarding the quality of the filtrate, precoat filtration was observed to produce a clear filtrate with negligible suspended solids content, while the body feed filtrates were turbid, irrespective of which type of filter aid was used.

E-PORT. Improving efficiency of Finnish port community by intelligent systems Final report of the Mobile Port project

The management of port-related supply chains is challenging due to the complex and heterogeneous operations of the ports with several actors and processes. That is why the importance of information sharing is emphasised in the ports. However, the information exchange between different port-related actors is often cumbersome and it still involves a lot of manual work and paper. Major ports and port-related actors usually have advanced information systems in daily use but these systems are seldom interoperable with each other, which prevents economies of scale to be reached. Smaller ports and companies might not be equipped with electronic data transmission at all. This is the final report of the Mobile port (MOPO) project, which has sought ways to improve the management and control of port-related sea and inland traffic with the aid of ICT technologies. The project has studied port community systems (PCS) used worldwide, evaluated the suitability of a PCS for the Finnish port operating environment and created a pilot solution of a Finnish PCS in the port of HaminaKotka. Further, the dry port concept and its influences on the transportation system have been explored. The Mobile Port project comprised of several literature reviews, interviews of over 50 port-related logistics and/or ICT professionals, two different kinds of simulation models as well as designing and implementing of the pilot solution of the Finnish PCS. The results of these multiple studies are summarised in this report. Furthermore, recommendations for future actions and the topics for further studies are addressed in the report. The study revealed that the information sharing in a typical Finnish port-related supply chain contains several bottlenecks that cause delays in shipments and waste resources. The study showed that many of these bottlenecks could be solved by building a port community system for the Finnish port community. Almost 30 different kinds of potential services or service entities of a Finnish PCS were found out during the study. The basic requirements, structure, interfaces and operation model of the Finnish PCS were also defined in the study. On the basis of the results of the study, a pilot solution of the Finnish PCS was implemented in the port of HaminaKotka. The pilot solution includes a Portconnect portal for the Finnish port community system (available at https://www.portconnect.fi) and two pilot applications, which are a service for handling the information flows concerning the movements of railway wagons and a service for handling the information flows between Finnish ports and Finland-Russian border. The study also showed that port community systems can be used to improve the environmental aspects of logistics in two different ways: 1) PCSs can bring direct environmental benefits and 2) PCSs can be used as an environmental tool in a port community. On the basis of the study, the development of the Finnish port community system should be continued by surveying other potential applications for the Finnish PCS. It is also important to study if there is need and resources to extend the Finnish PCS to operate in several ports or even on a national level. In the long run, it could be reasonable to clarify whether there would be possibilities to connect the Finnish PCS as a part of Baltic Sea wide, European-wide or even worldwide maritime and port-related network in order to get the best benefit from the system

Targeted measures bring the greatest benefits for environmental protection in agriculture final report of the TEHO Plus project (2011–2014)

Targeted measures bring the greatest benefits for environmental protection in agriculture final report of the TEHO Plus project (2011–2014). Particular priority areas of the project activities included creating a training package for agri-environment advisers and testing it, farm-specific advisory services and exploitation of experiences of advice provision, putting together an information package of agri-environment issues, farm-level experiments, and development of water quality monitoring. The recommendations issued by advisers on targeting environmental measures were based on utilising geographical information material and nutrient balances. The project was implemented in cooperation by Southwest Finland Centre for Economic Development, Transport and the Environment, MTK-Satakunta and MTK-Varsinais-Suomi. The project received funding from the Ministry of Agriculture and Forestry and the Ministry of the Environment. Participating farmers, with whom environmental advice was developed and experiments were carried out, were important partners for the project. The operating area of the project was Satakunta and Varsinais-Suomi in Southwest Finland, but its outcomes can be exploited nationally. A national perspective was ensured by close cooperation with actors in different provinces. This final report describes project experiences and outcomes including environmental advisory services, training of agri-environmental advisers, farm visits and the feedback received from farmers on agri-environmental advice, development of water quality monitoring, experiments and project work.

Helsingin ammattikorkeakoulu Stadian kulttuurituottamisen suuntautumisvaihtoehto : ensimmäisen opintonsa aloittaneen vuosikurssin seuranta

This thesis is based on a questionnaire presented to pilot students on the Degree Programme in Media, at Helsinki Polytechnic Stadia, of 1999. The initial aim was to discover whether the school was of use in the transition process into a field of work. Based on this, the questions for a questionnaire were formulated. The research thus aimed at answering questions concerning a) whether the education answered the need of working life b) the work situation of respondents and c) how respondents saw the future of Arts Management as well as themselves. The questionnaire was prepared using Stadia's Elomake software on the Internet. There was also a project specific contract for this final project, allowing information gathered during the project to be used in regional curriculum work. The thesis deals with Arts Management curriculum work within the framework provided by polytechnic law as well as Stadia's curriculum work processes. Research and education in Arts Management in Finland generally is also studied, and specifically in Stadia itself. The essence of this final project is derived from the analysis of the answers to the questionnaire. All responses were analysed, with the answers being divided into three subheadings according to the research questions. Questions and answers were also examined through a correlation matrix in an attempt to discover the dependency between things and conclusions were made in the light of relevant source literature. The questionnaire is meant to be used for the follow-up of every graduating Arts Management group. Information obtained through this questionnaire will of benefit in preliminary curriculum work.