Effectiveness of Pilotage

The objective of the pilotage effectiveness study was to come up with a process descrip-tion of the pilotage procedure, to design performance indicators based on this process description, to be used by Finnpilot, and to work out a preliminary plan for the imple-mentation of the indicators within the Finnpilot organisation. The theoretical aspects of pilotage as well as the guidelines and standards used were determined through a literature review. Based on the literature review, a process flow model with the following phases was created: the planning of pilotage, the start of pilo-tage, the act of pilotage, the end of pilotage and the closing of pilotage. The model based on the literature review was tested through interviews and observation of pilotage. At the same time an e-mail survey directed at foreign pilotage organisations, which included a questionnaire concerning their standards and management systems, operations procedures, measurement tools and their attitude to the passage planning, was conducted. The main issues in the observations and interviews were the passage plan and the bridge team co-operation. The phases of the pilotage process model emerged in both the pilotage activities and the interviews whereas bridge team co-operation was relatively marginal. Most of the pilotage organisations, who responded to the query, also use some standard-based management system. All organisations who answered the survey use some sort of a pilotage process model. According to the query, the main measuring tools for pilotage are statistical information concerning pilotage and the organisations, the customer feedback surveys, and financial results. Attitudes to-wards passage planning were mostly positive among the organisations. A workshop with pilotage experts was arranged where the process model constructed on the basis of the literature review was tuned to match practical pilotage. In the workshop it was determined that certain phases and the corresponding tasks, through which pilo-tage can be described as a process, were identifiable in all pilotage. The result of the workshop was a complemented process model, which separates incoming and outgoing traffic, as well as the fairway pilotage and harbour pilotage from each other. Addition-ally indicators divided according to the data gathering method were defined. Data con-cerning safety and traffic flow is gathered in the form of customer feedback. The pilot's own perceptions of the pilotage process are gathered through self-assessment. The measurement data which is connected to the phases of the pilotage process is generated e.g. by gathering statistics of the success of the pilot dispatches, the accuracy of the pi-lotage and the incidents that occurred during the pilotage, near misses, deviations and accidents. The measurement data is collected via the PilotWeb at the closing of the pilo-tage. A separate project and a project group with pilots also participating will be established for the deployment of the performance indicators. The phases of the project are: the definition phase, the implementation phase and the deployment phase. The purpose of the definition phase is to prepare questions for ship commanders concerning the cus-tomer feedback questionnaire and also to work out the self-assessment queries and the queries concerning the process indicators.

Synthesis of percarboxylic acids in microreactor

Percarboxylic acids are commonly used as disinfection and bleaching agents in textile, paper, and fine chemical industries. All of these applications are based on the oxidative potential of these compounds. In spite of high interest in these chemicals, they are unstable and explosive chemicals, which increase the risk of synthesis processes and transportation. Therefore, the safety criteria in the production process should be considered. Microreactors represent a technology that efficiently utilizes safety advantages resulting from small scale. Therefore, microreactor technology was used in the synthesis of peracetic acid and performic acid. These percarboxylic acids were produced at different temperatures, residence times and catalyst i.e. sulfuric acid concentrations. Both synthesis reactions seemed to be rather fast because with performic acid equilibrium was reached in 4 min at 313 K and with peracetic acid in 10 min at 343 K. In addition, the experimental results were used to study the kinetics of the formation of performic acid and peracetic acid. The advantages of the microreactors in this study were the efficient temperature control even in very exothermic reaction and good mixing due to the short diffusion distances. Therefore, reaction rates were determined with high accuracy. Three different models were considered in order to estimate the kinetic parameters such as reaction rate constants and activation energies. From these three models, the laminar flow model with radial velocity distribution gave most precise parameters. However, sulfuric acid creates many drawbacks in this synthesis process. Therefore, a ´´greener´´ way to use heterogeneous catalyst in the synthesis of performic acid in microreactor was studied. The cation exchange resin, Dowex 50 Wx8, presented very high activity and a long life time in this reaction. In the presence of this catalyst, the equilibrium was reached in 120 second at 313 K which indicates a rather fast reaction. In addition, the safety advantages of microreactors were investigated in this study. Four different conventional methods were used. Production of peracetic acid was used as a test case, and the safety of one conventional batch process was compared with an on-site continuous microprocess. It was found that the conventional methods for the analysis of process safety might not be reliable and adequate for radically novel technology, such as microreactors. This is understandable because the conventional methods are partly based on experience, which is very limited in connection with totally novel technology. Therefore, one checklist-based method was developed to study the safety of intensified and novel processes at the early stage of process development. The checklist was formulated using the concept of layers of protection for a chemical process. The traditional and three intensified processes of hydrogen peroxide synthesis were selected as test cases. With these real cases, it was shown that several positive and negative effects on safety can be detected in process intensification. The general claim that safety is always improved by process intensification was questioned.

Osakkeiden yhtiöoikeudellinen vaihdannan rajoittaminen ja VC-DCF -arvonmäärityksen käyttömahdollisuudet osakkeenomistajan irtaantuessa kasvuyhtiöstä

Yhtiöoikeus, yhtiöoikeuden reunaehtojen mukainen yhtiöjärjestys ja osakassopimus määrittävät kolme sääntelytasoa osakkeenomistajan irtaantuessa osakeyhtiöstä. Ulkopuolisen pääomasijoittajan liittyminen kohdeyhtiön vähemmistöosakkeenomistajaksi edellyttää monipuolista sopimista ja räätälöityjen määräys- ja sopimuslausekkeiden käyttöä yhtiöjärjestyksessä ja osakassopimuksessa tulevaa etukäteen sovittua irtaantumista varten. Yhtiöoikeudellinen määräystaso yhtiöjärjestyksessä, jota täydennetään osakeyhtiölain tahdonvaltaisella säännöstöllä, luo edellytykset osakkeenomistajien välisen riskienhallinnan toteuttamiseksi osakassopimuksessa. Osakeyhtiölain mukaisilla pakottavilla exit-oikeuksilla ja erikseen määritellyillä irtaantumistavoilla voi olla erilaiset arvonmääritystavat. Erityisen arvonmääritystavan valinta ja sen liittäminen sopimuskokonaisuuteen on syytä tehdä harkitusti niin, että irtaantumistilanteet määritetään tapauskohtaisesti etukäteen. Start-up -vaiheessa tapahtuvan rahoituksen kiertokulkusuunnittelun ja arvonmäärityksen siirryttäessä Venture Capital-arvonmäärityksestä kasvuvaiheen diskontattujen kassavirtojen DCF-arvonmääritysmalliin tulee olla yhteensovitettuja yhtiöoikeudellisesti ja sopimusoikeudellisesti. Erilaisten kauppahintamekanismien vaikutukset lunastushintaan on tunnistettava. Yrityksen rahoituksen eri kehitysvaiheita kuvaavaa yhdistettyä VC-DCF -arvonmääritysmallia on tarpeellista käyttää tietyissä tilanteissa, koska VC-menetelmä ei itse pysty ratkaisemaan kaikkia fundamentaalista tarvetta vaativia arvonmääritysvaiheita. Työssä esitetään erilaiset irtaantumisvaihtoehdot ja tarvittavien DCF-arvonmäärityskomponenttien sisältö ja käyttömahdollisuudet, joilla voidaan pienentää vähemmistöosakkeenomistajan riskiä ja tuottovaatimusta.

Effects of mineral sorting on concentrator design and economics

Ore sorting after crushing is an effective way to enhance the feed quality of a concentrator. Sorting by hand is the oldest way of concentrating minerals but it has become outdated because of low capacities. Older methods of sorting have also been difficult to use in large scale productions due to low capacities of sorters. Data transfer and processing and the speed of rejection mechanisms have been the bottlenecks for effective use of sorters. A fictive chalcopyrite ore body was created for this thesis. The properties of the ore were typical of chalcopyrite ores and economical limit was set for design. Concentrator capacity was determined by the size of ore body and the planned mine life. Two concentrator scenarios were compared, one with the sorting facility and the other without sorting. Comparison was made for quality and amount of feed, size of equipment and economics. Concentrator with sorting had lower investment and operational cost but also lower incomes due to the ore loss in sorting. Net cash flow, net present value and internal rate of interest were calculated for comparison of the two scenarios.

Novel technology for preparation of optically active chemicals

Asymmetric synthesis using modified heterogeneous catalysts has gained lots of interest in the production of optically pure chemicals, such as pharmaceuticals, nutraceuticals, fragrances and agrochemicals. Heterogeneous modified catalysts capable of inducing high enantioselectivities are preferred in industrial scale due to their superior separation and handling properties. The topic has been intensively investigated both in industry and academia. The enantioselective hydrogenation of ethyl benzoylformate (EBF) to (R)-ethyl mandelate over (-)-cinchonidine (CD)-modified Pt/Al2O3 catalyst in a laboratory-scale semi-batch reactor was studied as a function of modifier concentration, reaction temperature, stirring rate and catalyst particle size. The main product was always (R)-ethyl mandelate while small amounts of (S)-ethyl mandelate were obtained as by product. The kinetic results showed higher enantioselectivity and lower initial rates approaching asymptotically to a constant value as the amount of modifier was increased. Additionally, catalyst deactivation due to presence of impurities in the feed was prominent in some cases; therefore activated carbon was used as a cleaning agent of the raw material to remove impurities prior to catalyst addition. Detailed characterizations methods (SEM, EDX, TPR, BET, chemisorption, particle size distribution) of the catalysts were carried out. Solvent effects were also studied in the semi-batch reactor. Solvents with dielectric constant (e) between 2 and 25 were applied. The enantiomeric excess (ee) increased with an increase of the dielectric coefficient up to a maximum followed by a nonlinear decrease. A kinetic model was proposed for the enantioselectivity dependence on the dielectric constant based on the Kirkwood treatment. The non-linear dependence of ee on (e) successfully described the variation of ee in different solvents. Systematic kinetic experiments were carried out in the semi-batch reactor. Toluene was used as a solvent. Based on these results, a kinetic model based on the assumption of different number of sites was developed. Density functional theory calculations were applied to study the energetics of the EBF adsorption on pure Pt(1 1 1). The hydrogenation rate constants were determined along with the adsorption parameters by non-linear regression analysis. A comparison between the model and the experimental data revealed a very good correspondence. Transient experiments in a fixed-bed reactor were also carried out in this work. The results demonstrated that continuous enantioselective hydrogenation of EBF in hexane/2-propanol 90/10 (v/v) is possible and that continuous feeding of (-)-cinchonidine is needed to maintain a high steady-state enantioselectivity. The catalyst showed a good stability and high enantioselectivity was achieved in the fixed-bed reactor. Chromatographic separation of (R)- and (S)-ethyl mandelate originating from the continuous reactor was investigated. A commercial column filled with a chiral resin was chosen as a perspective preparative-scale adsorbent. Since the adsorption equilibrium isotherms were linear within the entire investigated range of concentrations, they were determined by pulse experiments for the isomers present in a post-reaction mixture. Breakthrough curves were measured and described successfully by the dispersive plug flow model with a linear driving force approximation. The focus of this research project was the development of a new integrated production concept of optically active chemicals by combining heterogeneous catalysis and chromatographic separation technology. The proposed work is fundamental research in advanced process technology aiming to improve efficiency and enable clean and environmentally benign production of enantiomeric pure chemicals.

Railways, Airports and Sea Container Operators as Publicly Listed Companies – Financial Performance and Shareholder Value Creation Perspective

Logistics infrastructure and transportation services have been the liability of countries and governments for decades, or these have been under strict regulation policies. One of the first branches opened for competition in EU as well as in other continents, has been air transports (operators, like passenger and freight) and road transports. These have resulted on lower costs, better connectivity and in most of the cases higher service quality. However, quite large amount of other logistics related activities are still directly (or indirectly) under governmental influence, e.g. railway infrastructure, road infrastructure, railway operations, airports, and sea ports. Due to the globalization, governmental influence is not that necessary in this sector, since transportation needs have increased with much more significant phase as compared to economic growth. Also freight transportation needs do not correlate with passenger side, due to the reason that only small number of areas in the world have specialized in the production of particular goods. Therefore, in number of cases public-private partnership, or even privately owned companies operating in these sub-branches have been identified as beneficial for countries, customers and further economic growth. The objective of this research work is to shed more light on these kinds of experiments, especially in the relatively unknown sub-branches of logistics like railways, airports and sea container transports. In this research work we have selected companies having public listed status in some stock exchange, and have needed amount of financial scale to be considered as serious company rather than start-up phase venture. Our research results show that railways and airports usually need high fixed investments, but have showed in the last five years generally good financial performance, both in terms of profitability and cash flow. In contrary to common belief of prosperity in globally growing container transports, sea vessel operators of containers have not shown that impressive financial performance. Generally margins in this business are thin, and profitability has been sacrificed in front of high growth – this also concerns cash flow performance, which has been lower too. However, as we examine these three logistics sub-branches through shareholder value development angle during time period of 2002-2007, we were surprised to find out that all of these three have outperformed general stock market indexes in this period. More surprising is the result that financially a bit less performing sea container transportation sector shows highest shareholder value gain in the examination period. Thus, it should be remembered that provided analysis shows only limited picture, since e.g. dividends were not taken into consideration in this research work. Therefore, e.g. US railway operators have disadvantage to other in the analysis, since they have been able to provide dividends for shareholders in long period of time. Based on this research work we argue that investment on transportation/logistics sector seems to be safe alternative, which yields with relatively low risk high gain. Although global economy would face smaller growth period, this sector seems to provide opportunities in more demanding situation as well.

The Possibility of Greenhouse Gas Mitigation in Ethiopian Cement Industry

Cement industry significantly associated with high greenhouse gas (GHG) emissions. Considering the environmental impact, particularly global warming potential, it is important to reduce these emissions to air. The aim of the study is to investigate the mitigation possibility of GHG emissions in Ethiopian cement industry. Life cycle assessment (LCA) method used to identify and quantify GHG emissions during one ton of ordinary portland cement (OPC) production. Three mitigation scenarios: alternative fuel use, clinker substitution and thermal energy efficiency were applied on a representative gate-to-gate flow model developed with GaBi 6 software. The results of the study indicate that clinker substitution and alternative fuel use play a great role for GHG emissions mitigation with affordable cost. Applying most energy efficient kiln technology, which in turn reduces the amount of thermal energy use, has the least GHG emissions reduction intensity and high implementation cost comparing to the other scenarios. It was found that the cumulative GHG emissions mitigation potential along with other selected mitigation scenarios can be at least 48.9% per ton of cement production.

Taloudellisen ohjauksen kehittäminen projektiliiketoimintaa harjoittavassa yrityksessä, tapaustutkimus

Tämän Pro Gadu –tutkielman keskeisimpänä tavoitteena oli tutkia millaisista osa-alueista projektiliiketoiminnan taloudellisen ohjauksen kokonaisuus muodostuu ja miten näitä voidaan kehittää. Tutkimus on toteutettu tapaustutkimuksena, jossa hyödynnetään kvalitatiivisia tutkimusmenetelmiä, kuten haastatteluita, joista saatuja vastauksia käytetään kohdeyrityksen taloudellisen ohjauksen kehittämisen pohdinnassa. Haastatteluvastausten perusteella pyrittiin löytämään poikkeavuuksia olemassa olevan tutkimukseen sekä kirjallisuuteen linkittäen. Haastateltavina toimi konsernin eri tahojen edustajia, jonka seurauksena tutkimukselle saatiin lievän vastakkain asettelun seurauksena huomattavaa lisäarvoa. Tutkimustulokset osoittavat, että taloudellisen ohjauksen kehittämisen osa-alueet ovat hyvin monimuotoisia ja yksittäisen yrityksen kohdalla yleistyksiä on vaikeaa tehdä. Kohdeyrityksen tapauksessa myyntivaiheen suunnitteluvaiheen prosessien, hankintojen hallinnan sekä jälkilaskelmien kehittämisen nähtiin olevan taloudellisen ohjauksen kannalta tärkeimmät elementit.

Estrutura de propriedade e de controle das empresas de capital aberto no Brasil

This paper has as its main objective to measure the magnitude of deviations between control rights and cash-flow rights for the ultimate shareholder with the largest voting rights of limited liability companies in Brazil. Furthermore, it pinpoints how these discrepancies are generated, evaluating the relative importance of the issuance of preferred stocks with no voting rights, pyramidal arrangements of ownership, and cross-shareholdings. The data set embraces 602 companies that in 2001 complied with the mandatory requirement of filing to the CVM.

The role of management accounting systems and venture capital investors for start-up firms

The role of star-up firms in economy and the importance of venture capital investors for the growth of start-up firms have been highlighted in recent years. The growth challenges of start-up firms consist of fast changing environment, the availability of venture capital funding and the development of firm management in the growth phase. A growing number of studies have focused on management accounting systems and venture capital in start-up and growth firm context. In this thesis the role of management accounting systems and venture capital investors is considered in the growth phase of firm development. The theoretical objective of this thesis is to construct a theoretical framework in order to describe the importance of management accounting systems and venture capital investors in start-up firms. The practice orientated objective of this thesis is to study the application of management accounting systems and management accounting based information in start-up firms in high-technology industry as well as the impact of venture capital for management accounting system design. In addition, the growth challenges of start-up firms are studied in order to understand the context in which management accounting systems are used. The research approach of theoretical part is conceptual as the theoretical framework is constructed by combining literature on firm growth, management accounting and venture finance in order to analyse the phenomenon. The action-orientated research approach is appropriate for analysing and describing of the studied phenomenon through empirical evidence. The empirical evidence was collected through interviews with three experts in start-up firm accelerator centers, four representatives of start-up firms and one venture capital investor. The results indicate that the growth challenges of stat-up firms are not related to the development of management accounting systems. Managers of start-up firms expressed a positive attitude towards management accounting systems that improve efficiency of operations. In start-up firms flexible and adjustable management accounting practices, such as budgets, cash flow calculations and future-orientated analysis tools, are applied that support planning and coordination of operations. The results indicate that venture capital investors affect the provision and the quality of management accounting information during the investment process. In addition, venture capital investors enhance the use of management accounting information for internal coordination in start-up firms. By applying the theoretical framework in the analysis, it can be stated that by acting as support function management accounting systems facilitate start-up firms development.

Pienyrityksen arvonmääritys yrityskauppatilanteessa

Tämän Pro-gradu tutkielman tavoitteena on tutkia, miten pienyrityksen arvo määrittyy yrityskauppatilanteessa. Tämän lisäksi tutkimus pyrkii selvittämään millaisia erityispiirteitä pienyrityksen arvonmääritykseen liittyy ja miten eri arvonmääritysmenetelmät soveltuvat pienyrityksen arvonmääritykseen. Empiirinen tutkimus koostuu kolmesta yrityskauppaan ja arvonmääritykseen keskittyneen asiantuntijan haastattelusta. Haastattelujen avulla on tarkoitus lisätä ymmärrystä pienyritysten arvonmäärityksestä, sen erityispiirteistä, soveltuvista arvonmääritysmenetelmistä sekä siitä, miten lopullinen arvo muodostuu. Tutkimuksen tulokset osoittavat, että pienyrityksen arvon määrittäminen on vaativa prosessi, jossa on otettava huomioon monia erityisiä piirteitä. Yhtä oikeaa arvonmääritysmenetelmää ei ole vaan useita eri menetelmiä käytetään rinnakkain luotettavan arvon muodostamiseksi. Tärkeimpänä huomioitavana piirteenä esille nousi yrityksen tulevaisuuden ennustamisen hankaluus, minkä takia tulevaisuudelle ei anneta paljoa painoarvoa pienyrityksen arvonmäärityksessä. Tämä vaikuttaa olennaisesti käytettäviin arvonmääritysmenetelmiin ja niiden luotettavuuteen. Rahoitusteoreettisesti oikeaoppisin arvonmääritysmenetelmä, vapaan kassavirran malli, ei tulosten perusteella ole soveltuvin malli kaikkien pienyritysten kohdalla. Syynä tähän on, että suuri osa yrityksen arvosta muodostuu tulevaisuuden kassavirroista, joita pienyrityksen kohdalla on haasteellista ennustaa. Kaikki asiantuntijat käyttivät jokaisen pienyrityksen arvonmäärityksen yhteydessä markkinapohjaisia kertoimia, mutta tämänkin mallin käytön yhteydessä on omat haasteensa ja vaatii arvonmäärittäjältä syvällistä osaamista yrityksen toimialasta. Arvonmäärityksen lisäksi pienyrityksen toiminnan luonne lisää omat erityispiirteet, jotka huomioidaan arvoa laskevina riskitekijöinä. Pienyrityksen toiminta kiteytyy usein yrittäjän osaamiseen, joka koetaan suurena riskinä yrityskaupassa ja täten lopullista arvoa laskevana tekijänä. Voidaankin todeta, että pienyrityksen kohdalla arvonmääritys luo pohjan sekä raja-arvot ostettavasta yrityksestä maksettavalle hinnalle, mutta lopullinen kauppahinta muodostuu neuvottelujen lopputuloksena.

Hydraulic and fluvial geomorphological models for a bedrock channel reach of the Twenty Mile Creek /

Bedrock channels have been considered challenging geomorphic settings for the application of numerical models. Bedrock fluvial systems exhibit boundaries that are typically less mobile than alluvial systems, yet they are still dynamic systems with a high degree of spatial and temporal variability. To understand the variability of fluvial systems, numerical models have been developed to quantify flow magnitudes and patterns as the driving force for geomorphic change. Two types of numerical model were assessed for their efficacy in examining the bedrock channel system consisting of a high gradient portion of the Twenty Mile Creek in the Niagara Region of Ontario, Canada. A one-dimensional (1-D) flow model that utilizes energy equations, HEC RAS, was used to determine velocity distributions through the study reach for the mean annual flood (MAF), the 100-year return flood and the 1,000-year return flood. A two-dimensional (2-D) flow model that makes use of Navier-Stokes equations, RMA2, was created with the same objectives. The 2-D modeling effort was not successful due to the spatial complexity of the system (high slope and high variance). The successful 1 -D model runs were further extended using very high resolution geospatial interpolations inherent to the HEC RAS extension, HEC geoRAS. The modeled velocity data then formed the basis for the creation of a geomorphological analysis that focused upon large particles (boulders) and the forces needed to mobilize them. Several existing boulders were examined by collecting detailed measurements to derive three-dimensional physical models for the application of fluid and solid mechanics to predict movement in the study reach. An imaginary unit cuboid (1 metre by 1 metre by 1 metre) boulder was also envisioned to determine the general propensity for the movement of such a boulder through the bedrock system. The efforts and findings of this study provide a standardized means for the assessment of large particle movement in a bedrock fluvial system. Further efforts may expand upon this standardization by modeling differing boulder configurations (platy boulders, etc.) at a high level of resolution.

Étude des maxima de champs gaussiens corrélés.

Ce mémoire porte sur l’étude des maxima de champs gaussiens. Plus précisément, l’étude portera sur la convergence en loi, la convergence du premier ordre et la convergence du deuxième ordre du maximum d’une collection de variables aléatoires gaussiennes. Les modèles de champs gaussiens présentés sont le modèle i.i.d., le modèle hiérarchique et le champ libre gaussien. Ces champs gaussiens diffèrent par le degré de corrélation entre les variables aléatoires. Le résultat principal de ce mémoire sera que la convergence en probabilité du premier ordre du maximum est la même pour les trois modèles. Quelques résultats de simulations seront présentés afin de corroborer les résultats théoriques obtenus.

Photoacoustic thermal characterization of Al2O3–Ag ceramic nanocomposites

Laser-induced nondestructive photoacoustic (PA) technique has been employed to determine the thermal diffusivity of nanometal (Ag) dispersed ceramic alumina matrix sintered at different temperatures. The thermal diffusivity values are evaluated by knowing the transition frequency from the amplitude spectrum of PA signal using the one-dimensional heat flow model of Rosencwaig and Gersho. Analysis of the data shows that heat transport and hence the thermal diffusivity value is greatly affected by the influence of incorporation of foreign atom. It is also seen that sintering temperature affects the thermal diffusivity value in a substantial manner. The results are interpreted in terms of variation in porosity and carrier-assisted heat transport mechanism in nanometal dispersed ceramics.

Modeling Stock Order Flows and Learning Market-Making from Data

Stock markets employ specialized traders, market-makers, designed to provide liquidity and volume to the market by constantly supplying both supply and demand. In this paper, we demonstrate a novel method for modeling the market as a dynamic system and a reinforcement learning algorithm that learns profitable market-making strategies when run on this model. The sequence of buys and sells for a particular stock, the order flow, we model as an Input-Output Hidden Markov Model fit to historical data. When combined with the dynamics of the order book, this creates a highly non-linear and difficult dynamic system. Our reinforcement learning algorithm, based on likelihood ratios, is run on this partially-observable environment. We demonstrate learning results for two separate real stocks.