Miracle-dz/UniFAR-FTUs huggingface dataset:
Nonparametric Identification and Estimation of Nonadditive Hedonic Models

This paper studies the identification and estimation of preferences and technologies in equilibrium hedonic models. In it, we identify nonparametric structural relationships with nonadditive heterogeneity. We determine what features of hedonic models can be identified from equilibrium observations in a single market under weak assumptions about the available information. We then consider use of additional information about structural functions and heterogeneity distributions. Separability conditions facilitate identification of consumer marginal utility and firm marginal product functions. We also consider how identification is facilitated using multimarket data.
Multi‐attribute Procurement Auctions: Efficiency and Social Welfare in Theory and Practice

Quasi‐linearity of preferences is one of the standard assumptions in auction theory. This assumption is of particular significance in multi‐attribute reverse auctions which are used in procurement. This paper presents an analysis of this assumption and its implications. Building on observations of scholars in economics and decision sciences who note that in practice such preferences may be rare, it shows that in procurement of services and goods that are to be produced, price is often interrelated with costs. When preferences can be represented with convex or concave utilities, the alternatives in which the buyer’s surplus is maximized are different from those that maximize social welfare. The result is that reverse auctions may cause a significant loss of social welfare, which may be of particular significance for public organizations. The analysis of concave efficient frontiers in the utility space which are the result of concave and linear utility functions, shows that it is possible to determine alternatives for which social welfare is greater than for the alternative which is the winning bids. If the winning seller is willing to share the increase in utility with the buyer who faces a loss, then these alternatives can produce for both the buyer and the seller, utility values that are higher than produced by the winning bid.
Towards Portable Controlled Natural Languages for Querying Ontologies

Natural Language Interfaces (NLIs) to structured data allow users to interact with a system using written or spoken language to perform tasks that require knowledge of a formal language. Due to natural language complexity and ambiguity, such interfaces usually support a Controlled Natural Language (CNL): a subset of a natural language that includes certain vocabulary and grammar rules that have to be followed. Building vocabulary differs from one system to another, and the way this is performed significantly affects portability : portable CNLs for querying ontologies are those that can be adapted easily to new domains without sacrificing performance. In this paper we describe the approach for dynamically extending the vocabulary supported by such systems, through a dialog with the user.
Michał Woźniak Combining Classifiers – Concept and Applications

Problem of pattern recognition is accompanying our whole life, therefore methods of automatic pattern recognition is one of the main trend in Artificial Intelligence. Multiple classifier systems (MCSs) ar e currently the focus of intense research. In this conceptual approach, t he main effort is concentrated on combining knowled ge of the set of individual classifiers. Proposed work presents a br ief survey of the main issues connected with MCSs a nd provides comparative analysis of some classifier fusion meth ods.
Controle de Robs Mveis via Modos Deslizantes e Redes Neurais

The complete model of a mobile robot can be divided into kinematics and dynamics. To take advantage from this fact, a combined controller of a sliding mode kinematic controller with a neural network computed-torque dynamic controller is proposed. The proof of stability is based on the Lyapunov theory. Concerning with Brockett’s theorem, the kinematic controller fulfills the requirements and the robot can be stabilized in a desired posture. Experimental real-time results are presented.
Primena multifraktalne analize mikroskopskih slika u klasifikaciji intraosealnih metastatskih karcinoma

mikroskopskih medicinskih slika s ciljem njihove klasifikacije, u smislu utvrðivanja primarnog karcinoma u slucajevima intraosealnih metastatskih karcinoma. Dosadasnja saznanja ukazuju da postoji razlika u morfologiji zdravih i kancerogenih celija. Prethodni rezultati, izloženi u magistarskom radu kandidatkinje „Klasifikacija digitalnih medicinskih slika primenom multifraktalne analize“ [ANDJ06], i primenjeni u klasifikaciji slika karcinoma kolona, otvorili su mogucnosti za dalja istraživanja i moguce primene multifraktalne analize na mikrofotografije uzoraka drugih tkiva. S obzirom da su, u slucaju razlicitih vrsta primarnih karcinoma, celije cesto neregularnog ("haoticnog") oblika, utvrðivanje eventualne korelacije izmeðu multifraktalnih parametara koji opisuju oblik celija i primarnih karcinoma, moglo bi imati veliku primenu. Ocekuje se da multifraktalna analiza omoguci definisanje objektivnih pokazatelja kojima se može izvrsiti klasifikacija tkiva. Multifraktalna analiza u klasifikaciji primarnog karcinoma, kao pomocni alat, mogla bi ubrzati proces odlucivanja i doprinela smanjenju subjektivnog faktora i verovatnoce greske pri dijagnozi.
Crystalline extensions and the weight part of Serre’s conjecture

Let p > 2 be prime. We complete the proof of the weight part of Serre’s conjecture for rank two unitary groups for mod p representations in the totally ramified case, by proving that any Serre weight which occurs is a predicted weight. This completes the analysis begun in [BLGG11], which proved that all predicted Serre weights occur. Our methods are a mixture of local and global techniques, and in the course of the proof we use global techniques (as well as local arguments) to establish some purely local results on crystalline extension classes. We also apply these local results to prove similar theorems for the weight part of Serre’s conjecture for Hilbert modular forms in the totally ramified case.
Unified Service Description Language 3.0 (usdl) Overview

Services are increasingly being exposed and delivered outside company firewalls and on the Internet through the rise of on-demand applications, cloud computing and business networks. As the forms of services being exposed become more sophisticated, the conventional approaches for describing and accessing them, largely through technical interface descriptions, pose limitations. These approaches are concerned with technical access, leaving open the way consumers understand details of business operations, pricing, legal and other implications of using services. In addition to consumers requesting services, there are emerging third-party intermediaries who can deliver and further monetize services in the form of brokers, channel partners and cloud providers. This raises questions about how such details can be understood without full reliance on service providers. The Unified Service Description Language (USDL) is proposed to describe various types of services ranging from professional to electronic services. It aims at a holistic service description putting a special focus on business aspects such as ownership and provisioning, release stages and dependencies in a service network, composition and bundling, pricing and legal aspects among others, in addition to technical aspects. It proposes a consolidated foundation for service-based systems enabling different roles to participate in diverse aspects of provisioning in service networks.
MODIFIED BREGMAN ITERATION FOR PORTFOLIO OPTIMIZATION

We consider the l1-regularized Markowitz model, where a l1-penalty term is added to the objective function of the classical mean-variance one to stabilize the solution process, promoting sparsity in the solution and avoiding short positions. In this paper, we consider the Bregman iteration method to solve the related constrained optimization problem. We propose an iterative algorithm based on a modified Bregman iteration, in which an adaptive updating rule for the regularization parameter is defined. Our main result shows that the modified scheme preserves the properties of the original one. Numerical tests are reported, which show the effectiveness of the our approach.
MA(DL): A NORMATIVE LOGIC FOR AUTHORIZATION IN SEMANTIC-AWARE ENVIRONMENTS

Semantic technology provides an abstraction layer above existing computational environments, especially the Web, to give information a well-defined meaning. Moving toward semanticaware environments imposes new security requirements. One of the most important requirement is the authorization and security policy inference based on the existing semantic relationships in the abstract (conceptual) layer. Most of the authorization models proposed for these environments are incomplete and their inference rules are not guaranteed to be consistent, sound, and complete. To have a sound and complete system for policy specification and inference, in this paper, a special kind of modal logic, called MA(DL)2, is proposed with corresponding syntax, proof theory, and semantics. This logic is the combination of multi-authority version of deontic logic (MADL) and description logic (DL). It is proven that the proposed logic is sound and complete. We then propose an authorization model based on the MA(DL)2 logic, which enables authorities of different security domains to specify their security policies in conceptual level (over the provided abstract semantic layer) in terms of deontic statuses: obligation, prohibition, permission, and gratuitousness. The logical foundation of the model enables it to infer implicit security policies from the explicit ones based on the semantic relationships defined in subjects, objects, and actions ontologies. Context-awareness and modal conflict resolution of policies (stated by different authorities in the shared domain of objects) are other characteristics of the proposed model.
Pricing American Options in Regime-Switching Models: FFT Realization

The pricing problem for American options in Markov-modulated Levy models is solved. The early exercise boundaries and prices are calculated using a generalization of Carr's randomization procedure for regime-switching models. The pricing procedure is efficient even if the number of states is large provided the transition rates are not large w.r. t. the riskless rates. The payoffs and riskless rates may depend on a state. Special cases are stochastic volatility models and models with stochastic interest rate; both must be modeled as finite-state Markov chains. In contrast with the earlier version of the method, an explicit algorithm is formulated for wide classes of Levy processes, and FFT and iFFT are used.
Ontology-based Top-k Global Schema Generation Ontology-based Top-k Global Schema Generation

Global schema generation is the problem of generating a unified schema based on existing heterogeneous local schemas and a set of correspondences which are generated by a schema matching algorithm. The current schema integration approaches cannot satisfy users' requirements due to several reasons. The existing approaches cannot handle hierarchical schema structure, cannot solve conflicts problems, and only generates one merging result. To deal with these kinds of problems, top-k global schema generation approach is proposed in this research. The proposed approach consists of three steps: (1) Relational schemas are converted to ontologies; (2) Ontologies are merged and top-k results are generated; (3) Users can choose one of the top-k merged ontologies and convert it back to the relational schema. The approach utilizes ontology as a base merging model to create the global schema, because ontology can provide semantic and detail constraints. The objective of this research is to generate the global schema with high quality but less user involvement. Since different users may have their own preferred global schemas, top-k ranking algorithms are utilized to obtain multiple schema integration results, so users may have more than one choice. After comparing the approach in this research with state of the art schema integration approaches, the proposed approach better preserves the hierarchical structure, and generates the global schema with higher quality.
Estimation of Radio Signal Quality Degradation by Means of Neural Network and Non-parametric Regression Model

33 categories. For example, the word traurig (sad) refers to the categories «Affect», «Negative emotion» and «Sadness». We analyzed all the monologues, calculated the number of words for each category and divided them by the total amount of words in each monologue. By this way we got 64 characteristics of 56 monologues. Our task was to investigate the dependency between these 64 features and the results of the subtest «Information», and to find several informative features out of 64 characteristics. We combined 4 or 5 features together, trained the nonparametric model and applied our method. As a result, the category «Affection» had the largest value of the firstorder partial derivative and was estimated as a more informative feature. «Positive emotions» and «Negative emotions» are subcategories of «Affection» and are also relevant according to our algorithm. However, «Anger» and «Optimism» do not have large values of ˆ i x f  . The
Integrated Communication and Control Systems: Part I—Analysis

Computer networking is a reliable and efficient means for communications between disparate and distributed components in complex dynamical processes like advanced aircraft, spacecraft, and autonomous manufacturing plants. The role of Integrated Communication and Control Systems (ICCS) is to coordinate and perform inter­ related functions, ranging from real-time multi-loop control to information display and routine maintenance support. In ICCS, a feedback control loop is closed via the common communication channel which multiplexes digital data from the sensor to the controller and from the controller to the actuator along with the data traffic from other loops and management functions. Due to the asynchronous timedivision multiplexing of the network protocol, time-varying and possibly stochastic delays are introduced in the control system, which degrade the system dynamic per­ formance and are a source of potential instability. The paper is divided into two parts. In the first part, the delayed control system is represented by a finitedimensional, time-varying, discrete-time model which is less complex than the ex­ isting continuous-time models for time-varying delays; this approach allows for simpler schemes for analysis and simulation of ICCS. The second part of the paper addresses ICCS design considerations and presents simulation results for certain operational scenarios of ICCS.
ILR VOL 58/3.qxd

This article reports the results of an empirical study of the impact of school inputs on pupils’ performance in private (independent) schools in the United Kingdom, using a new school-level panel dataset constructed from information provided by the Independent Schools Information Service. The authors show a consistent negative relationship between the pupil-teacher ratio at a school and the examination results achieved by pupils aged 18, controlling for the pupils’ performance in examinations two years earlier. The results are noteworthy in comparison with results of studies for the state sector, relatively few of which have found a consistent and statistically significant effect of the pupil-teacher ratio.
Complexidade, Tecnologia e Educação

Este trabalho analisa, de forma critica, os conceitos e a possivel aplicacao do tema complexidade (e demais assuntos relacionados, como auto-organizacao, emergencia e descentralizacao), na educacao. Mostra recursos tecnologicos modernos que permitem o trabalho pedagogico a partir das definicoes da complexidade, dando suporte ao questionamento didatico de tal abordagem. E tentativa de se imaginar inovacoes em conceitos e praticas educativas. Sugere que a discussao teorica que tem sido caracteristica do assunto comeca a adentrar as fronteiras da aplicacao efetiva, em situacoes pedagogicas.
Affine hom-complexes

For two general polytopal complexes the set of face-wise affine maps between them is shown to be a polytopal complex in an algorithmic way. The resulting algorithm for the affine hom-complex is analyzed in detail. There is also a natural tensor product of polytopal complexes, which is the left adjoint functor for Hom(-,-). This extends the corresponding facts from single polytopes, systematic study of which was initiated in [5,11]. Explicit examples of computations of the resulting structures are included. In the special case of simplicial complexes, the affine hom-complex is a functorial subcomplex of Kozlov's combinatorial hom-complex [13], which generalizes Lovasz' well-known construction [14] for graphs.
Susceptibility of Picea abies and Pinus sylvestris Seedlings of Various origins to Heterobasidion annosum and H. parviporum

Abstract Five-year-old Norway spruce and four-year-old Scots pine seedlings of various origin were inoculated with Heterobasidion annosum s.s. and H. parviporum to estimate whether the susceptibility of seedlings to Heterobasidion was affected by origin of seeds. In total, 520 spruce and 538 pine seedlings from different seed sources and provenance regions of Latvia were tested. Four months after inoculation the fungal growth was measured. The results highlight differences between development of H. annosum and H. parviporum in spruce and pine seedlings. We did not find any seed source that was more resistant than others.
Neuroscience and Biobehavioral Reviews Memory Formation, Consolidation and Transformation

Memory formation is a highly dynamic process. In this review we discuss traditional views of memory and offer some ideas about the nature of memory formation and transformation. We argue that memory traces are transformed over time in a number of ways, but that understanding these transformations requires careful analysis of the various representations and linkages that result from an experience. These transformations can involve: (1) the selective strengthening of only some, but not all, traces as a function of synaptic rescaling, or some other process that can result in selective survival of some traces; (2) the integration (or assimilation) of new information into existing knowledge stores; (3) the establishment of new linkages within existing knowledge stores; and (4) the updating of an existing episodic memory. We relate these ideas to our own work on reconsolidation to provide some grounding to our speculations that we hope will spark some new thinking in an area that is in need of transformation.
Eigenspace arrangements of reflection groups

The lattice of intersections of reflecting hyperplanes of a complex reflection group W may be considered as the poset of 1-eigenspaces of the elements of W. In this paper we replace 1 with an arbitrary eigenvalue and study the topology and homology representation of the resulting poset. After posing the main question of whether this poset is shellable, we show that all its upper intervals are geometric lattices, and then answer the question in the affirmative for the infinite family G(m,p,n) of complex reflection groups, and the first 31 of the 34 exceptional groups, by constructing CL-shellings. In addition, we completely determine when these eigenspaces of W form a K(pi,1) (resp. free) arrangement. For the symmetric group, we also extend the combinatorial model available for its intersection lattice to all other eigenvalues by introducing "balanced partition posets", presented as particular upper order ideals of Dowling lattices, study the representation afforded by the top (co)homology group, and give a simple map to the posets of pointed d-divisible partitions.
Nutzen und Kosten von Online-Optionen der Musikbeschaffung

Das Internet eröffnet neue Beschaffungswege, um das persönliche Repertoire an Musikstücken zu erweitern. In drei empirischen Studien mit insgesamt über 1000 Befragten wird die Nutzung verschiedener Wege beleuchtet, Musik online zu beschaffen. Die Studien folgen der Grundlogik des Nutzenund Belohnungsansatzes, wonach die Präferenz für jeden Zugangsweg aus einem subjektiven Kalkül resultiert, in welchem erwartete Vorund Nachteile gegeneinander aufgewogen werden. Für drei Beschaffungswege wird das Muster jener Kostenund Nutzenerwartungen explorativ analysiert. Studie I betrachtet die Beschaffung von Musik durch illegalen Download, Studie II fokussiert die Erwartungen, die an den kostenpflichtigen Musik-Download geknüpft sind, und Studie III analysiert Vorstellungen zum Internetradio. Es zeigt sich, dass insbesondere die Erwartung einer selektiven und zeitlich wie monetär kostengünstigen Befriedigung des individuellen Musikgeschmacks durch ein breites Angebot mit den Internet-Beschaffungsformen verbunden ist.
Edge-to-Edge Resource Discovery using Metadata Replication

Edge computing has been recently introduced as an intermediary between Internet of Things (IoT) deployments and the cloud, providing data or control facilities to participating IoT devices. This includes actively supporting IoT resource discovery, something particularly pertinent when building large- scale, distributed and heterogeneous IoT systems. Moreover, edge devices supporting resource discovery are required to meet the stringent requirements prevalent in IoT systems including high availability, low-latency, and privacy. To this end, we present a resource discovery platform for IoT resources situated at the edge of the network. Our approach aims at providing a seamless discovery process that is able to (i) extend the covered area by deploying additional edge nodes and (ii) assist in the development of new IoT applications that target already available resources. Within our proposed platform, devices located in a certain proximity connect and form an edge-to-edge network that we call an edge neighborhood - our edge-to-edge metadata replication platform enables participating devices to discover available resources. Our solution is characterized by absence of centralization, as edge nodes exchange metadata about available resources within their scope in a peer-to-peer manner.
Pagamento por servicos ambientais: instrumento de incentivo a preservacao ambiental

Payment for environmental services: instrument to promote environmental preservation . Environmental problems have been the general concern of humanity to the conservation of the environment is, in our times, a matter of survival, to ensure survival to the present generations and to allow life to future generations. This monograph this based on the key aspects of the payments for environmental services - PSA. Payment for Environmental Services (PES) is considered a promising mechanism to solve some problems related to the degradation of ecosystems, especially those caused by human degradation. quality quantity service, providers conservation or preserve forested areas, This monograph will see its main features and settings as payment methods, his challenges and its implementation as economic instrument, effectiveness and efficiency on the economic market, social aspects and value for the protection of ecosystems. The research is of the systematic literature review, and sought more general information about the subject studied, to further involve a study of the fundamentals and key aspects of the mechanisms of payment for environmental services. We conclude that it is a promising project with the potential to provide equity, effectiveness and efficiency. What is already recognition of its importance, as well as a breakthrough for the conservation of the environment? Just as the inferred lessons can help structuring and public management for future public policies and PES projects.