999 resultados para Modes de coordination hybrides
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1786/09/15 (N21).
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1786/07/15 (N17).
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The saccharinate anion, obtained by deprotonation of the N-H moiety of saccharin (o-sulfobenzimide) is a very versatile and polyfunctional ligand in coordination chemistry. In this review the different forms of metal-to-ligand interactions involving this anion and some other coordination peculiarities are briefly discussed on the basis of some selected examples.
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Classical and quantum theory of spin waves in the vortex state of a mesoscopic submicron magnetic disk have been developed with account of the finite mass density of the vortex. Oscillations of the vortex core resemble oscillations of a charged string in a potential well in the presence of the magnetic field. A conventional gyrotropic frequency appears as a gap in the spectrum of spin waves of the vortex. The mass of the vortex has been computed, and the result agrees with experimental findings. The finite vortex mass generates a high-frequency branch of spin waves. The effects of an external magnetic field and dissipation have been addressed.
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Diplomityö on osa Kymenlaakson ammattikorkeakoulun SÖKÖ II-hanketta, missä tehdään toimintamalli suuren öljyntorjuntaoperaation koordinointiin rannikon öljytorjunnasta vastaaville viranomaisille. Työn tavoitteena oli selvittää alusöljyvahingossa kuolleiden eläinten sekä eläinten keräilystä ja hoidosta syntyvien jätteiden käsittelymenetelmät ja soveltuvat käsittelylaitokset. Lisäksi tavoitteena oli selvittää kuolleiden eläinten välivarastointialueen tekniset vaatimukset ja öljyiselle eläinjätteelle soveltuva kuljetuskalusto. Työn teoriaosuudet toteutettiin kirjallisten lähteiden ja asiantuntijahaastatteluiden avulla. Tärkeäksi osaksi työtä muodostui kustannuslaskelma, missä laskettiin kuolleiden eläinten keräilystä aina loppukäsittelyyn asti muodostuvat kustannukset. Työn teoriaosuudet loivat pohjan kustannuslaskelmalle. Kuolleiden eläinten loppukäsittelyyn valittiin kolme eri laitosta ja kolme eri käsittelytekniikkaa, mitkä ovat: rumpu-uuni, siirrettävä termodesorptio ja renderöinti. Kuolleet eläimet kannattaa keskitetysti kerätä ja kuljettaa yhdelle alueelle, missä suoritetaan kuolleiden eläinten välivarastointi kylmäkonteissa ja tilastointi sekä elävien eläinten pesu ja hoito. Kustannuslaskelman perusteella siirrettävä termodesorptiolaitos on halvin käsittelyvaihtoehto, mutta kustannuserot muihin laitoksiin ovat pienet. Koko kuolleiden eläinten turvallisen käsittelyn kustannukset ovat alle promillen koko suuren öljyvahingon kustannuksista. Loppukäsittelylaitosta valittaessa on käsittelykustannuksia tärkeämpää selvittää laitoksen sen hetkinen jätteenkäsittelytilanne ja vapaa käsittelykapasiteetti kuolleille eläimille.
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Complexes of Ni(II) 2,3-, 3,5- and 2,6-dimethoxybenzoates have been synthesized, their physico-chemical properties have been compared and the influence of the position of -OCH3 substituent on their properties investigated. The analysed compounds are crystalline, hydrated salts with green colour. The carboxylate ions show a bidentate chelating or bridging coordination modes. The thermal stabilities of Ni(II) dimethoxybenzoates were investigated in air in the range of 293-1173 K. The complexes decompose in three steps, yelding the NiO as the final product of decomposition. Their solubilities in water at 293 K are in the order of 10-2-10-4 mol×dm-3. The magnetic susceptibilities for the analysed dimethoxybenzoates of Ni(II) were measured over the range of 76-303 K and the magnetic moments were calculated. The results reveal that the complexes are the high-spin ones and the ligands form the weak electrostatic field in the octahedral coordination sphere of the central Ni(II) ion. The various position -OCH3 groups in benzene ring cause the different steric, mesomeric and inductive effects on the electron density in benzene ring.
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The aim of this study was to develop a theoretical model for information integration to support the deci¬sion making of intensive care charge nurses, and physicians in charge – that is, ICU shift leaders. The study focused on the ad hoc decision-making and immediate information needs of shift leaders during the management of an intensive care unit’s (ICU) daily activities. The term ‘ad hoc decision-making’ was defined as critical judgements that are needed for a specific purpose at a precise moment with the goal of ensuring instant and adequate patient care and a fluent flow of ICU activities. Data collection and research analysis methods were tested in the identification of ICU shift leaders’ ad hoc decision-making. Decision-making of ICU charge nurses (n = 12) and physicians in charge (n = 8) was observed using a think-aloud technique in two university-affiliated Finnish ICUs for adults. The ad hoc decisions of ICU shift leaders were identified using an application of protocol analysis. In the next phase, a structured online question¬naire was developed to evaluate the immediate information needs of ICU shift leaders. A national survey was conducted in all Finnish, university-affiliated hospital ICUs for adults (n = 17). The questionnaire was sent to all charge nurses (n = 515) and physicians in charge (n = 223). Altogether, 257 charge nurses (50%) and 96 physicians in charge (43%) responded to the survey. The survey was also tested internationally in 16 Greek ICUs. From Greece, 50 charge nurses out of 240 (21%) responded to the survey. A think-aloud technique and protocol analysis were found to be applicable for the identification of the ad hoc decision-making of ICU shift leaders. During one day shift leaders made over 200 ad hoc decisions. Ad hoc decisions were made horizontally, related to the whole intensive care process, and vertically, concerning single intensive care incidents. Most of the ICU shift leaders’ ad hoc decisions were related to human resources and know-how, patient information and vital signs, and special treatments. Commonly, this ad hoc decision-making involved several multiprofessional decisions that constituted a bundle of immediate decisions and various information needs. Some of these immediate information needs were shared between the charge nurses and the physicians in charge. The majority of which concerned patient admission, the organisation and management of work, and staff allocation. In general, the information needs of charge nurses were more varied than those of physicians. It was found that many ad hoc deci-sions made by the physicians in charge produced several information needs for ICU charge nurses. This meant that before the task at hand was completed, various kinds of information was sought by the charge nurses to support the decision-making process. Most of the immediate information needs of charge nurses were related to the organisation and management of work and human resources, whereas the information needs of the physicians in charge mainly concerned direct patient care. Thus, information needs differ between professionals even if the goal of decision-making is the same. The results of the international survey confirmed these study results for charge nurses. Both in Finland and in Greece the information needs of charge nurses focused on the organisation and management of work and human resources. Many of the most crucial information needs of Finnish and Greek ICU charge nurses were common. In conclusion, it was found that ICU shift leaders make hundreds of ad hoc decisions during the course of a day related to the allocation of resources and organisation of patient care. The ad hoc decision-making of ICU shift leaders is a complex multi-professional process, which requires a lot of immediate information. Real-time support for information related to patient admission, the organisation and man¬agement of work, and allocation of staff resources is especially needed. The preliminary information integration model can be applied when real-time enterprise resource planning systems are developed for intensive care daily management
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The aim of the present paper is to study the relationship between the fracture modes in hydrogen-assisted cracking (HAC) in microalloied steel and the emission of acoustic signals during the fracturing process. For this reason, a flux-cored arc weld (FCAW) was used in a high-strength low-alloy steel. The consumable used were the commercially available AWS E120T5-K4 and had a diameter of 1.6 mm. Two different shielding gases were used (CO2 and CO2+5% H2) to obtain complete phenomenon characterization. The implant test was applied with three levels of restriction stresses. An acoustic emission measurement system (AEMS) was coupled to the implant test apparatus. The output signal from the acoustic emission sensor was passed through an electronic amplifier and processed by a root mean square (RMS) voltage converter. Fracture surfaces were examined by scanning electron microscopy (SEM) and image analysis. Fracture modes were related with the intensity, the energy and the number of the peaks of the acoustic emission signal. The shielding gas CO2+5% H2 proved to be very useful in the experiments. Basically, three different fracture modes were identified in terms of fracture appearance: microvoid coalescence (MVC), intergranular (IG) and quasi-cleavage (QC). The results show that each mode of fracture presents a characteristic acoustic signal.
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Business incubators (BIs) have an important role in promoting entrepreneurship and innovation. Networks have been identified as one of the main factors influencing business incubation success; however, their management has not been widely covered in previous business incubation research. Therefore, the main objective of this research is to investigate the role of network coordination in business incubation. Thus, the research aims to understand how the BI as a hub firm coordinates, i.e. manages and orchestrates, the business incubation process. As business incubation is also claimed to be affected by country specific factors, a cross-country comparison of Finland and Russia is conducted. Based on previous scientific literature on networks, network management, network orchestration and business incubation, a theoretical model combining business incubation and network coordination is developed. Through a qualitative multiple-case study evidence from a cross-country sample of BI managers and their residents was collected via semi-structured interviews. Based on the empirical data the network coordination mechanisms used by BIs are identified, yet only minor differences in network coordination in different countries are found. The results suggest that network coordination enables value creation in business incubation.
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Seasonal savannas are characterized by an intense drought that influences their functioning. Hyperseasonal savannas experience additionally a waterlogging during the rainy season. In South America, the largest savanna environment is the Brazilian cerrado. To assess whether a particular dispersal mode or fruiting period is associated to the waterlogging, we examined dispersal and phenological groups in hyperseasonal and seasonal cerrado plant species. We compared the proportion of species and individuals in these groups with G-tests for independence in contingency tables. We did not find differences in the proportion of species; however, based on the proportion of individuals, the main dispersal strategy was anemochory in the hyperseasonal cerrado and zoochory in the seasonal cerrado. Phenological strategies of fruiting in safe periods of the year were differently selected in both cerrados. In the hyperseasonal cerrado, most individuals fruited in non-waterlogged periods, whereas in the seasonal cerrado, most individuals fruited in wetter periods. Thus, waterlogging may drive important modifications in the efficiency of the dispersal and phenological strategies of hyperseasonal savannas plants.
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Antikens judiska bibeltolkare hade ett annorlunda sätt att läsa Bibeln än den som moderna läsare är vana vid. Dessa tidiga exegeter tänkte att texten som nu finns i den hebreiska Bibeln, de kristnas Gamla Testamente, är helig ordagrant i den form som den fanns i under deras tid, att den inte innehåller några fel, och att Gud har en övergripande plan gällande helheten, så att man vid behov kan förklara ett Bibelställe med hjälp av ett annat. Dessa antaganden reflekteras i det sätt på vilket antikens exegeter läste och tolkade sin Bibel. Det här ser man då man läser deras texter, från 400-talet före vår tideräknings början till de första århundradena enligt vår tideräkning. Ett verktyg som antikens skrifttolkare ofta använde var den så kallade gezera shava -metoden, där de jämförde identiska ord och fraser i Bibeln för att skänka belysning åt oklara textställen. Hebreiskan, särskilt den ovokaliserade konsonanttexten, innehåller många homonyma ord, alltså ord som ser likadana ut men har olika betydelser. De tidiga exegeterna utnyttjade ofta de möjligheter till alternativa tolkningar som uppstår ur denna tvetydighet. Ibland kunde de dock tvärtom också dra paralleller ur kontextuella likheter, alltid efter behov. I denna avhandling står dessa tidiga anonyma bibeltolkare och deras tolkningar i fokus. Malakis bok, som härstammar från ca år 475 f.v.t., kan ses som ett viktigt tidigt exempel på denna tendens till nytolkning av traditioner. Boken själv har dock också blivit föremål till nytolkningar, redan i de tilläggsverser som finns i dess slut, men särskilt i senare judisk litteratur och i Nya Testamentet. I avhandlingen granskas de fem bibliska gestalter som nämns i Malaki: Jakob, Esau, Levi, Mose och Elia. Hur används de i boken och hur har senare traditioner som anknyter till dem influerats av Malaki? ------------------------------------------------ Antiikin juutalaiset raamatunselittäjät lukivat Raamattua eri tavoin kuin moderni lukija. Heidän näkemyksensä mukaan se teksti, joka nykyään löytyy heprealaisesta Raamatusta eli kristittyjen Vanhasta testamentista, oli pyhä juuri sellaisessa muodossa, jossa se oli heille välittynyt. Se oli virheetön, ja Jumalalla oli siitä kokonaisnäkemys, joka voisi selvitä myös tulkitsijalle, kun tämä vain tutkisi tekstiä riittävän tarkkaan. Nämä perusoletukset näkyvät tavassa, jolla antiikin eksegeetit lukivat ja tulkitsivat Raamattuaan. Se voidaan huomata heidän jälkeensä jättämistään teksteistä, alkaen noin 400-luvulta ennen ajanlaskumme alkua ja jatkuen ajanlaskumme ensimmäisiin vuosisatoihin. Antiikin raamatunselittäjät käyttivät yleisesti muun muassa metodia, joka rabbiinisessa kirjallisuudessa tunnetaan nimellä gezera shava. Raamatussa kahdessa tai useammassa kohtaa esiintyviä samoja sanoja ja ilmauksia verrattiin tällöin toisiinsa ja pyrittiin siten saamaan valaistusta epäselvinä pidettyihin tekstinkohtiin. Heprealle, etenkin sen vokalisoimattomassa muodossa, on tyypillistä homonyymisyys. Samannäköiset sanat voivat eri yhteyksissä tarkoittaa eri asioita. Varhaiset eksegeetit päätyivät usein tästä ilmiöstä nouseviin, keskenään vaihtoehtoisiin tulkintoihin. Toisaalta he saattoivat myös tarvittaessa selittää tekstinkohtaa toisella tekstinkohdalla ainoastaan näiden sisällöllisenkin yhtäläisyyden perusteella. Tässä väitöstutkimuksessa tarkastellaan näitä varhaisia, meille nimettömiksi jääneitä raamatunselittäjiä ja heidän tulkintojaan käyttämällä tutkimuksen lähtökohtana Malakian kirjaa. Malakiaa, joka on peräisin noin vuodelta 475 ennen ajanlaskumme alkua, voidaan pitää yhtenä tärkeimmistä ja varhaisimmista teksteistä, joissa traditioita yhdistellään ja kerrotaan uudelleen edellä mainittuihin perusajatuksiin nojaten ja niihin pohjautuvia menetelmiä käyttäen. Toisaalta Malakian kirjaa on myös tulkittu samojen periaatteiden mukaisesti jo sen myöhemmältä ajalta peräisin olevissa loppujakeissa, ja sittemmin muussa varhaisessa juutalaisessa kirjallisuudessa sekä Uudessa testamentissa. Väitöstutkimuksessa tarkastellaan erityisesti niitä viittä henkilöä, jotka mainitaan Malakian kirjassa: Jaakobia, Esauta, Leeviä, Moosesta ja Eliaa. Kirjoittaja tutkii, miten heidän hahmojaan on käytetty Malakian kirjassa, millaisiin heitä koskeviin traditioihin tämä käyttötapa perustuu, ja missä määrin Malakian kirjan vaikutus on havaittavissa myöhemmässä näihin henkilöihin liitetyssä perinteessä.
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Within the framework of the working memory model proposed by A. Baddeley and G. Hitch, a dual-task paradigm has been suggested to evaluate the capacity to perform simultaneously two concurrent tasks. This capacity is assumed to reflect the functioning of the central executive component, which appears to be impaired in patients with dysexecutive syndrome. The present study extends the investigation of an index ("mu"), which is supposed to indicate the capacity of coordination of concurrent auditory digit span and tracking tasks, by testing the influence of training on the performance in the dual task. The presentation of the same digit sequence lists or always-different lists did not differently affect the performance. The span length affected the mu values. The improved performance in the tasks under the dual condition closely resembled the improvement in the single-task performance. So, although training improved performance in the single and dual conditions, especially for the tracking component, the mu values remained stable throughout the sessions when the single tasks were performed first. Conversely, training improved the capacity of dual-task coordination throughout the sessions when dual task was performed first, addressing the issue of the contribution of the within-session practice to the mu index.
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The measure "mu", proposed as an index of the ability to coordinate concurrent box-crossing (BC) and digit-span (DS) tasks in the dual task (DT), should reflect the capacity of the executive component of the working memory system. We investigated the effect of practice in BC and of a change in the digit span on mu by adding previous practice trials in BC and diminishing, maintaining or increasing the digit sequence length. The mu behavior was evaluated throughout three trials of the test. Reported strategies in digit tasks were also analyzed. Subjects with diminished span showed the best performance in DT due to a stable performance in DS and BC in the single- and dual-task conditions. These subjects also showed a more stable performance throughout trials. Subjects with diminished span tended to employ effortless strategies, whereas subjects with increased span employed effort-requiring strategies and showed the lowest means of mu. Subjects with initial practice trials showed the best performance in BC and the most differentiated performance between the single- and dual-task conditions in BC. The correlation coefficient between the mu values obtained in the first and second trials was 0.814 for subjects with diminished span and practice trials in BC. It seems that the within-session practice in BC and the performance variability in DS affect the reliability of the index mu. To control these factors we propose the introduction of previous practice trials in BC and a modification of the current method to determine the digit sequence length. This proposal should contribute to the development of a more reliable method to evaluate the executive capacity of coordination in the dual-task paradigm.
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The renewable energy industry in Zambia is poised for growth and offers many possibilities for Finnish firms willing to enter the market. The Zambian government’s deliberate policy measures aim at attracting foreign direct investment (FDI) into this sector. This study rationalises that this could be the pull factor for Finnish firms. The thesis gives an overview of the industry and investigates an appropriate mode of entry, basing its arguments on the comparison analysis of the two economies with the use of the world forum’s stages of economic development as a framework. The theoretical part of the study examines internationalisation theories, entry mode choice and factors influencing the choice. The multiple case study approach is implored, analysing four case companies from Finland with the use of extant literature on internationalisation relevant to the study. The research design involves the use of documentation, secondary data, interviews and observation. The results of the case analyses show that the Finnish firm’s most preferred entry mode initially is exporting because it is considered to be less risky. Additionally, the findings also reveal that the selection of a suitable mode of entry is dependent on the firms’ size, orientation and international experience and could therefore be considered to be subjective. Paramount is the act of gaining market knowledge. The study shows that only hydro-electrical, solar energies and biomass are by far the most used and known forms of renewable energy in Zambia, while other alternative sources still remain un-exploited thus highlighting a growth potential. However, policy formulation and the regulatory framework in the renewable energy sector were found to be wanting.