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Repozytoria RCIN
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INSTYTUT ARCHEOLOGII I ETNOLOGII POLSKIEJ AKADEMII NAUK
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INSTYTUT BADAŃ LITERACKICH POLSKIEJ AKADEMII NAUK
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INSTYTUT BADAWCZY LEŚNICTWA
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INSTYTUT BIOLOGII DOŚWIADCZALNEJ IM. MARCELEGO NENCKIEGO POLSKIEJ AKADEMII NAUK
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INSTYTUT BIOLOGII SSAKÓW POLSKIEJ AKADEMII NAUK
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INSTYTUT CHEMII FIZYCZNEJ PAN
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INSTYTUT CHEMII ORGANICZNEJ PAN
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INSTYTUT FILOZOFII I SOCJOLOGII PAN
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INSTYTUT GEOGRAFII I PRZESTRZENNEGO ZAGOSPODAROWANIA PAN
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INSTYTUT HISTORII im. TADEUSZA MANTEUFFLA POLSKIEJ AKADEMII NAUK
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INSTYTUT JĘZYKA POLSKIEGO POLSKIEJ AKADEMII NAUK
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INSTYTUT MATEMATYCZNY PAN
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INSTYTUT MEDYCYNY DOŚWIADCZALNEJ I KLINICZNEJ IM.MIROSŁAWA MOSSAKOWSKIEGO POLSKIEJ AKADEMII NAUK
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INSTYTUT PODSTAWOWYCH PROBLEMÓW TECHNIKI PAN
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INSTYTUT SLAWISTYKI PAN
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SIEĆ BADAWCZA ŁUKASIEWICZ - INSTYTUT TECHNOLOGII MATERIAŁÓW ELEKTRONICZNYCH
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MUZEUM I INSTYTUT ZOOLOGII POLSKIEJ AKADEMII NAUK
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INSTYTUT BADAŃ SYSTEMOWYCH PAN
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INSTYTUT BOTANIKI IM. WŁADYSŁAWA SZAFERA POLSKIEJ AKADEMII NAUK
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- A case study dealing with allocation of EU structural funds in the capital region of Mazovia in Poland is presented. A new method supporting multicriteria analysis and selection of projects applying for the funds has been proposed and used in the study. According to the method an interactive procedure has been implemented in which a group of experts formulates the multicriteria decision making problem, carries out an analysis of the projects, and finally creates a ranking of the projects. Experiences from the case study are presented.
- A computationally simple method for generating reduced-order models that minimise the L2 norm of the approximation error while preserving a number of second-order information indices as well as the steady-state value of the step response, is presented. The method exploits the energy-conservation property peculiar to the Routh reduction method and the interpolation property of the L2 -optimal approximation. Two examples taken from the relevant literature show that the suggested techniques may lead to approximations that are not worse than those afforded by popular more cumbersome techniques.
- A computer-based system has been constructed including a macroeconomic model and a multicriteria optimization tool for two opposing objectives: maximization of the consumption and minimization of the greenhouse gases (GHG) emission. The model contains four production sectors with a special attention devoted to the energy sector. Computational results are presented for the case of Poland.
- A concept of a computer network having the structure of a double-ring with redundant nodes is presented. The network is built of cyclically connected modules, each one consisting of two nodes (concentrators). One of the nodes is redundant and continues to operate after the other node fails (hot redundancy). Each node is directly connected to both nodes of the preceding and the succeeding modules while each station (computer) is connected to both nodes of one module. A module is assumed to be operable if one of its nodes is functioning. Redundant nodes ensure high reliability of the network. A communication protocol adjusted to the network's specific structure is developed. It is based on the token-passing mechanism. The network is assumed to be operable if data sent by any functioning station return to it after transiting all other functioning stations. With the use of probability theory, and Markov chain theory, an algorithm computing the network's reliability is constructed. The double-ring network model has been solely developed by the author. It is demonstrated that in the reliability aspect the proposed solution surpasses standard techniques like Token Ring or FDDI.
- A concept of intuitionistic fuzzy multi-dimensional set (IFMDS) is developed. New properties of IFMDSs are discussed
- A decision situation is considered in which two decision makers negotiate cooperation conditions to realize a joint project. Each decision maker has his own set of criteria measuring results of the cooperation. The situation is modeled as the multicriteria bargaining problem. Construction of the computer-based system supporting the negotiation process is proposed. A special multiround mediation procedure is presented. According to the procedure the system supports multicriteria analysis made by the decision makers and generates mediation proposals. The mediation proposals are derived on the basis of the original solution to the multicriteria problem, presented in the paper. The solution expresses preferences of the decision makers. It generalizes the classic Nash solution concept on the multicriteria case.
- A decision situation is considered in which two decision makers negotiate cooperation conditions to realize a joint project. Each decision maker has his own set of criteria measuring results of the cooperation. The situation is modeled as the multicriteria bargaining problem. Construction of the computer-based system supporting the negotiation process is proposed. A special multiround mediation procedure is presented. According to the procedure the system supports multicriteria analysis made by the decision makers and generates mediation proposals. The mediation proposals are derived on the basis of the original solution to the multicriteria problem, presented in the paper. The solution expresses preferences of the decision makers. It generalizes the classic Nash solution concept on the multicriteria case.
- A decision support system for a selected area of emission control technologies( dedusting, desulphurization, denitrification) in the frame of the TA Luft has been developed and implemented on a personal computer within an expert system shell. The analysis of the decision process and the relevant techno-economic field is documented and first results of the resulting deterministic, static decision model within an expert system are shown.
- A decision support system for the analysis and foreca.sting of natura.I discrete-event processes is considered. The corresponding method is based on sample path ana.lysis using event-to-event operations. An application of the method in the computer-aided decision support system for longrange weather forecasting is mentioned.
- A distinct shift of viewpoints in considering the role of inforrnation in urban and regional developrnent has occured in recent years: While, during the seventies, the econornic-technological content of inforrnation, the degree of access to it and the spatial patterns of inforrnation flow have been predominant ·as objects of research, in the early eighties the advent of new comrnunication technologies has rnoved to the center of analytical interest (Funck, Kowalski, 1984).
- A family of parameter dependent elliptic optimal control problems with nonlinear boundary control is considered. The contro function is subject to amplitude constarints. It is shown that under standard coercivity conditions the solutions to the problems are Bouligand differentiable in (Ls, s < ∞) functions of the parameter.The differentials are characterized as the solutions of accessory linear-quadratic problems.
- A family of parametric linear-quadratic optimal control problems is considered. The problems are subject to state constraints. It is shown, that if weak second order sufficient optimality conditions and standard constarint qualifications are satisfied at the reference point, then, for small perturbations of the parameter, there exists a locally unique stationary point, corresponding to a solution. This point is a Lipschitz continuous functions of the parameter.
- A family of parametric linear-quadratic optimal control problems is considered. The problems are subject to state constraints. It is shown, that weak second order sufficient optimality conditions, together with standard constraint qualifications, ensure that the solutions and Lagrange multipliers are locally Lipschitz continuous functions of the parameter.
- A family of parametric linear-quadratic optimal control problems is considered. The problems are subject to state constraints. The conditions are derived, under which the KKT points are locally Lipschitz continuous and directionally differentiable functions of the parameter. These conditions consist of constraint qualifications and weakened coercivity conditions
- A fuzzy logic is applied in conatructing different ferma characteristic functiens, as well as, in the data consistency in the oomputer-aided control systeme at decision-making moment under conditions formalized with dificulty. In the case of software development both specialized software, and expert syetems the fuzzy sets theory is used for the facilitation of deciaion-meking in conditione of riale and uncertainty. This paper dealts with the approaches using the tools for constructing the characteristic function, an expert system whioh is empleyed for the determination of an increase of price value on an advanced to tenders proposals.
- A fuzzy preference relation is a popular model to represent both individual and group preferences. However, what is often sought is a subset of alternatives that is an ultimate solution of a decision problem. In order to arrive at such a final solution individual and/or group choice rules may be employed. There is a wealth of such rules devised in the context of the classical, crisp preference relations. Originally, most of the popular group decision making rules were conceived for classical (crisp) preference relations (orderings), and then extended to the case of traditional fuzzy preference relations. Moreover, they often differ in their assumptions about the properties of the preference relations to be processed. In the paper we pursue the path towards a universal representation of such rules that provides an effective generalization of the classical rules for the fuzzy case. Moreover, it leads to a meaningful extension to the linguistic preferences, in the spirit of the computing with words paradigm.
- A general form of a collective choice rule in group decision making under fuzzy prefernces and a fuzzy majority is proposed. It encompasses some well-known choice rules. Our point of departure is the fuzzy majority based linguistic aggregation rule (solution concept) ......
- A generalization of the entropy into intuitionistic fuzzy sets and interval-valued fuzzy sets is suggested and some properties of these new entropies are shown.
- A generalized net is presented in which sending, receiving and intercepting processes between fixed points are described. For achieving higher accuracy, the model uses intuitionistic fuzzy estimates of the messages that are sent, attacked and received. An “independent observer” is defined, collecting information about the running processes in the network between the corresponding users, exchanging confidential messages, and an intruder.
- A Guide to the FuzzyNumbers 0.3-1 Package for R
- A linguistic quantifier guided aggregation for an automatic text document categorization is considered. Text categorization is a specific problem of infonnation retrieval (IR) attracting recently a lot of attention and research. The applicability of fuzzy log ie in IR has been already advocated and shown. However, the specific task of text categorization has not yet been directly. addressed. Our approach is based on the calcu/us of linguistically quantified propositions proposed by 'Zadeh. Same computational results are presented
- A macroeconomic model has been developed and the multicriteria optimization has been applied. Two competing objectives are considered: maximization of the consumption and minimization of the greenhouse gases (GHG) emission. The model includes three sectors: producing intermediary inputs, consumer goods, and investment goods. Computational results are presented for the case of Poland.
- A monetary-fiscal game describing the interactions of the fiscal and monetary authorities is formulated and analyzed. A macroeconomic model for the Polish economy has been formulated on the basis of the concept of New Neoclassical Synthesis and respectively extended so as to accommodate the effects of fiscal policy. Several variants of the model have been estimated using statistical data for the Polish economy. It is assumed in the game that each party (monetary and fiscal) tries to achieve its own goal: the fiscal authority – the assumed GDP growth, and the monetary authority – an inflation level. The best response strategies of the authorities and the Nash equilibria are calculated and analyzed in two cases, namely when the decisions are made simultaneously and sequentially. The simulation results obtained indicate that when the authorities try to achieve independently their goals, in a general case the Nash equilibrium is not Pareto optimal. The best response strategies may lead to conflict escalation and to results that are not beneficial for both parties.
- A Negotiation Support System (NSS) architecture is presented that provides a negotiator with presciptive support in a complex negotiation environment Both sttategie and tactical support are considered and form the basis for the NSS architecture. The decision making philosophy of the strategie support is based on confliet analysis. Tactical support is provided by a rule-based system. The specifie goals and characteristics of the negotiator are reconciled with the possible plans of action generated by the tactical and strategie support systems through the use of a multicriteria decision making technique. The research required for the practical implementation of this system is aurently being completed.
- A new approach for an interactive support of multicriteria decision-making is presented. It is based on pairwise comparisons of alternatives and accepts any number of comparisons.
- A new approach to valuation of bonds under the default risk conditions, based on the concept of the investors' two-factor utility function is proposed. The first factor describes the expected average return from the risky investments, while the second – the worst case return. As a class of risky securities the so-called catastrophe bonds are considered. It is assumed that depending on the structure of the security contract, the invesor who buys the bond issued by a local authority governing the risky region – will lose his interest payments and/or the principal value, if a catastrophic event occurs. For the purpose of the valuation procedure, the new notions of the security safety level, the safety index, as well as two-rule decision model are successively introduced. The subjective scale as a measure of the degree of individuals' risk aversion is proposed. The idea of objective and subjective risk components is investigated. The methodology proposed is illustrated by a computational example.
- A new designing method of single-input single-output linear time-varying tracking systems with stochastic disturbances for polynomial command inputs is proposed. It has been shown that it is possible to choose the gain matrix k of the closed-loop system so that the output y(t) tracks the command input v(t) with lim E{[v(t)-y(t)]''} =0 for k = I, 2(E - expectation operator). (-,).
- A new generation computer-based modeling environment consisting out of a modeling, implementation and documentation tools named Structured Spreadsheet Modeling · (SSM) is an answer to the current crisis in modeling science. SSM was used in the construction of a computerized negotiation support model for resalving conflicts during the software system design. Both the SSM and the negotiation system are briefly presented in the paper.
- A new intuitionistic fuzzy implication is constructed. Some of its basic properties, as its relations with Modus Ponens, with intuitionistic logic axioms and Georg Klir and Bo Yuan’s axioms are studied.
- A new method for computer aided modelling, simulation and identification of flow dynamics in molten gloss furnaces is presented and numerically analysed. The process of the construction of glass tank furnace models occurs in several steps on which the sub-models with differentiated mathematical descriptions (with distributed or lumped differential equations) and dynamical features (with inertial and oscillatory characteristics and with slow and fast changeable dynamics) are setting up. The method proposed makes possible to prepare the models of glass tank furnaces of high degree of accuracy, described with the equations of rather high orders. The models are suited welI to estimate technological parameters of glass tank furnaccs and to control the glass melting processes.
- A new ordering on the class of intuitionistic fuzzy sets, the so called π- ordering, is introduced in this paper. As a start point we employ the modal operators on IFSs and investigate their properties in respect of the π-ordering. In the last section the new ordering is used for the definition of the index of indeterminacy over IFSs, which is supposed to satisfy three corresponding axioms. A few versions of the index of indeterminacy are proposed according the the structure of the underlying universe X, over which the IFSs are considered. This index measures how far (close) is an IFS from (to) the family of the usual FSs on the same universe X.
- A new set of operations subtraction over intuitionistic fuzzy sets are defined and some of their basic properties are studied.
- A new 'soft' cooperative - game - tbeoretic model of international economic cooperation is proposed. Basically, the part i cipating countries form coalitions and then choose appropriate economic strategi es to maxi mi ze a bene fit or payoff ( their shares of some commorlity). To account for the inherent 'softness' of this -problem, we apply fuzzy mathematical (linear) programming to model the economic behavior of the individual countries and their coalitions. This inakes it possible to introduce 'soft' ( imprecise or fuzzy) aspiration levels for the objective function values and the satisfaction of the constraints. This replaces the conventional strict and rigid optimization and constraint satisfaction which are often unrealistic in practice. We derive as a solution the C - core which is coalitionally stable.
- A new solution to the problem of finding all minimal d-cut-sets in a flow network with one source and one sink node is presented. According to the developed method, min-d-cut-sets are generated from min-τ-cut sets, where a τ-cut-set is a set of components whose removal or failure causes the source and sink to be topologically disconnected. A τ-cut-set is minimal if no its subset is a τ-cut-set. The method consists of two algorithms; the first one is applied if Φ(C)<2d, the second - if Φ(C)>=2d, where C is the min-τ-cut-set from which min-d-cut-sets are generated, and Φ(C) denotes the total flow capacity of C's components. This distinction results in quick generation of min-d-cut-sets without first having to find many non-d-cut sets or non-minimal d-cut-sets. The presented method is highly efficient, due to a number of technical improvements which include applying different algorithms for the cases Φ(C)<2d and Φ(C)>=2d, and an effective method of checking if the found min-d-cut set is a redundant one.
- A new trend of applications of the GIT in business has appeared in the contemporary management that is called virtualisation. Virtualisation is such a process of tran~formation of an organisation that allows small and medium-sized enterprises (SMEs) to break through various limitations in their functioning. Most of them were difficult to overcome without application of IT. One of the existing barriers is limitation of the scale of SMEs functioning. Such enterprises were commonly associated with a loca/ market, and their operation in the global market was a rarity. Even if they existed in it, their operation usually concerned specific products or services. Their operation in the global market was mostly restricted to operation as subcontractors of a large organisation. In the paper presented, on the following theoretical and practical problems: The notion of virtualisation and of virtual organisation, its framework and basie forms of implementation. The role of IT in the liquidation of barriers between enterprises. A strategie analysis of strengths and weaknesses, opportunities and threats (SWOT) of SMEs functioning owing to virtualisation in the global market.
- A novel approach for detecting patterns in price time series was suggested. The system for the consolidation phase recognitionwas proposed. It utilizes the concept of so-called fuzzy geometric protoform and classification trees.
- A preliminary estimation of the consequences of introducing wind energy and biomass energy to the energy sector is conside - red in order to evaluate the scale of the problem. The selected technologies are intehded to be applied in the scenario evaluations of energy sector expansion by use of a computer system for estimating the consequences of introducing the technology innovation to the economy.
- A problem of process calibration for nonsymmetric loss function is considered and an optimal calibration policy is suggested. The proposed calibration method might be used e.g. when the loss caused by oversize and undersize are not equal.
- A procedure for approximating fractional-order systems by means of integer-order state-space models is presented. It is based on the rational approximation of fractional-order operators suggested by Oustaloup. First, a matrix differential equation is obtained from the original fractional-order representation. Then, this equation is realized in a state-space form that has a sparse block-companion structure. The dimension of the resulting integer-order model can be reduced using an efficient algorithm for rational L2 approximation. Two numerical examples are worked out to show the performance of the suggested technique.
- A procedure for the aggregation of statistical data derived from the simulation of a GN model has been described. The method for utilization of that information has been described in details for the case when the same GN model is run for prognostic purposes. The concept of intuitionistic fuzziness is used to construct evaluations of the tokens’ transfer during the simulation runs, which are then interpreted as probabilities for tokens’ transfer during the prognostic ones.
- A review of results on first order shape-topological differentiability of energy functionals for a class of variational inequalities of elliptic type is presented. The Griffith shape functional was introduced as the distributed shape derivative of the elastic energy evaluated in a domain with a crack, with respect to the crack length. The dependence of this functional on domain perturbation far from rupture was investigated. As a result, the directional shape and topological derivatives of the nonsmooth Griffith shape functional are obtained with respect to boundary variations of an inclusion.
- A review of the generalized net models of different types of neural networks is given. A generalized net model of impulsive delay cellular neural networks is constructed.
- A robust game theoretic approach for constructing effective intemational concords for conflict solving is discusscd. An n-person coopcrative game in charactcristic function form is used for intcmational conflict solving via formation of coalitions. Nucleolus and augmented nuclcolus as the solution concepts of the game arc dcrived on its altcmative forms and robusmess of the solutions when the evaluation of the coalition values is varied is examined. For solving this problem, paramctric linear programming is used. This approach provides in a resemblant form an altemative device to solving the fuzzy linear programming based on interval analysis when diversified evaluation is introduced.
- A simple and effective method of parameter identification for a linear model of aperiodic processes with known time delay is presented in the paeper. The process time lag order and, subsequently, the remaining model parameters are determined from a few samples of the initial phase of the process step response. Test results regarding identification of selected electroheated control plants, as well those regarding the autotuning of PID controllers, are given.
- A solution for compliance and emission trading between companies in case of big uncertainties in emission observations is proposed. The market with effective permits is outlined. Estimated adjustments of emissions and effective permits for different emission sources are calculated for data from the literature.
- A special kind of inquiry is presented. Its base is a model of computer diagnostic analysis of large management systems. As a result of inquiry the trees of designed management information systems are directly obtained. The data (among them the parameters describing the particular tree nodes) fed to the computer (ODRA 1325) are processed and the detailed analysis (integration of trees forming the net of information connections, detection of diseases in the net, estimation of labouriousness, seeking the critical paths, etc.) is performed. The finał result is the minimized net of information connections of designed system with list of its inputs (source information), intermediate operations and outputs (receivers). The time coordination of partieular operations is given and the computer realisable operations arc proposed.
- A stable non stationary linear system is considered. A quality criterion is represented by a functional in the integral form of the sum of positive polynomiaes with respect to the state variables and squared control. lt is proved that the optima[ control is an irrational function of polynomial depending on the state variables. The minimum value of performance index can have two forms: the hyperelliptic integral or polynomial depending on the initial state.
- A stable non stationary linear system is considered. A quality criterion is represented by a functional in the integral form of the sum of positive polynomiaes with respect to the state variables and squared control. lt is proved that the optima[ control is an irrational Junction of polynomial depending on the state variables. The minimum value of performance index can have two forms: the hyperelliptic integral or polynomial depending on the initial state. In the presence of a prior information about the probability distribution that governs the random output of a statistical experiment we use the Bayes decisions methodology for verification of certain statistical hypotheses. In the case of precise statistical data or imprecise data described by a fuzzy information system the existing methodology is sufficient for testing of statistical hypotheses. In this paper we propose a new procedure that can be applied for the generał fuzzy statistical data. Concepts known from of the possibility theory, such as possibility and necessity indices, have been used in order_ to evaluate the correctness of Bayes decisions for imprecisely (e.g. linguistically) defined statistical data.
- A standard system which has the same solution for admissible initial conditions as a given singular discrete-time linear system with delays in state and input is derived. Same basie properties of the fundamental matrices of the singular discrete-time linear systems with delays are characterised. A method of determination of the standard system based on the shuffle algorithm is proposed.
- A statistical developed yield matrix which combine different arabie crops and grassland types with 56 different types of agricultural sites is the bas is for natura/ yield estimation. This yield matrix was combined with additional model approaches dependent on different site charcterisics, weather/climate, plant breeding, and agromanagement information, among them with fuzzy approaches for different nitrogen fertilization and plant protection levels. The integrated assessment of regional crop coverage is realized as the degree of crop coverage taken from (O, 1) using crop-specific stepwise temperature sumfunctions. The regionalization ofyield estimation and crop coverage models is realized by model integration into the Spatial Analysis and Modeling Tool (SAMT). The models are applied to the Qui/low catchment located in the Uckermark region, Germany. Spatial results,are presented and discussed.
- A system named Health Base has been developed in Kharkov. It is intended for the informational backup of the complex examination and treatment of persons injured in technogenic and na tural ca tas trophies. Heal th Base has a databank of case histories and program fac111t1es to update the databank, as well as to retrieve needed raw and processed information.
- A three-dimensional thermo-visco-elastic system for Kelvin-Voigt type material at small strains is considered. The existence of a unique global regular solution is proved without small data assumptions.
- A unified approach to mathematical modelling of controlled production systems is presented. The considered set of decisions includes not only the production process but also: the supply of raw materials, the acquisition of final products, the repairs and maintenance of technological units, etc. Models of the production system include variables, which represent the technological media and the technical states of production equipment. The proposed methods are characterized by the consideration of time limits of the validity of decision and the time of their introduction.
- A VoIP is a very hot topie today. Telecommunication always has been a very hermetic industry controlled by huge corporations. It is hard to imagine that a well known bank will buy PBX from an unknown or a small company. A couple years ago an open-source software had very little to do with telecommunication systems at all. Right now we are witnesses of a revolution in a telecommunication industry, because huge revolution in the world Internet network is a fact. Today real time media like voice and video can be transported by a packet network like Internet and appear to be real and serious competitors for a traditional telecommunication industry. An important thing is QoS (Quality of Service), which cause so many problems with Voice over IP. Even so there are many enthusiastic people who create open source VoIP software. Most famous Open Source PBX project is Asterisk project.
- Acceleralion of soientif!c and technological progress and of industrial, metropolitan and agricultural development leads to man's confrontation with nature. The influence of man on natura changes the equilibrium of its laws and established processes which leads to unpredictable conseąuences. Generally, these are negative, such as desertification, water and atmospheric pollution, lncrease in soil acidity or salinlty, destructlon of forests and severe exhaustion of nalural resources, impacts on human health and genetic mutations in plants and animals. Thls primarily occurs al the loca! and regional levels, leads to unpredictable negatlve consequences for the separate regions, and gradually also leads to negative consequences for the entire biosphere. The increasing scale and significance of man's role as an agent of global change was forcefully articulated between the two World Wars by a remarkable group of scholars. These included the French theologian and paleontologist, Pierre Teilhard de Chant.in, the Austrian-born American biophysicist, Alfred J. Lotka, and above all, I.he Russian mineraloglst, Vladimir lvanovich Vernadsky. Vernadsky (1926) first formulated the concept of the biosphere as the only terrestrlal envelope in which life can exist. In Vernadsky's opinion the most signlficant aspect of man's development was not his technology per se but rather the sense of global knowledge and communication engendered by that technology. He portrayed th!s "noosphere" or realm of thoughl as a new geological phenomenon on our planet. Vernadsky's main conoept was strongly developed by Soviet Academlc!an Vladimir Nikolajevich Suckachev (1964} as a complete science of biogeocenology or the science of eoosystems. Man's role as an agent of global change is associated wlth the emergence of an lncreasingly lnterdependent world economic system (Richards, 1985). Following he second World War, expanding industrial and agricultural developmant.
- Accountancy is a set on highly standardized events, that for information systems are subject of inte mal logical control. For broader description of the events and with the aim of business transactions standardization application of obligation, logic named in literature as a deontic logic would be appropriate.
- Adaptive method of strategy management in enterprise with use of virtual warehouse. In this paper presents meaning of virtual warehouse in enterprise for strategy management basing on adaptation and virtualisation results from models and data accessible in warehouse.
- The aim of the article is to discuss the essential role of social capital of IT company, based on the example of Microsoft. The paper presents the historical perspective of the concept of human and social capital and introduces its precursors who first discussed this subject. It shows that for a few centuries there has been huge interest in human and social capital and it emphasizes the necessity to appraise their value in a reliable way. It also discusses the essence of the orthogonality principle and fundamental equation and applies them to estimate the value of social capital of Microsoft. Moreover, the model of neural network, proposed by the author in 2013, was also used to measure those values and both assessments were compared and analyzed.
- The aim of the paper is the analysis of decision rules describing electorate preferences generated by machine learning methods. The rules are investigated with respect to conditions involved.
- The aim of the paper is to specify as well as to express some opinion on the basie factors of interes! rate risk. We will analyse the changebility of the term structure of interest rates and present the quantitative measures of analysis. We will also consider the problem of interest rate risk and its interactions with the generał category of investment risk.
