Miracle-dz/UniFAR-FTUs huggingface dataset:
Duality in MIP

This presentation treats duality in Mixed Integer Programming (MIP in short). A dual of a MIP problem includes a dual price function F , that plays the same role as the dual variables in Linear Programming (LP in the following). The price function is generated while solving the primal problem. However, different to the LP dual variables, the characteristics of the dual price function depend on the algorithmic approach used to solve the MIP problem. Thus, the cutting plane approach provides nondecreasing and superadditive price functions while branch-and-bound algorithm generates piecewise linear, nondecreasing and convex price functions. Here a hybrid algorithm based on branch-and-cut is investigated, and a price function for that algorithm is established. This price function presents a generalization of the dual price functions obtained by either the cutting plane or the branch-and-bound method.
THE SPATIAL CHARACTERISTICS OF DRY PORTS IN INDIA

Using the case of India, this paper investigates the spatial characteristics of dry ports. By applying the grid technique, an attempt is made to identify the optimal location of dry ports for three major industrial regions in southern, central and northern India, namely Tirupur, Nagpur and Ahmadabad, respectively. Attention is paid to whether the simulated optimal locations correspond to the real situations, as well as the reasons for and impacts of such similarities and/or differences.
Managing Meaning through Branding — the Case of a Consulting Firm

The current interest in organizational culture, identity, image and reputation and in organizational discourse points towards the pressure on contemporary organizations to focus attention on the symbolic dimensions of their activities. The phenomenon of branding, while originally portrayed as a marketing tool, can also be understood as an exercise in management of meaning. Branding does not only inform external stakeholders, such as customers and investors, about the values of the organization. It also potentially instructs and directs organizational members. In this sense, branding can be viewed as a management and leadership practice. Drawing on a longitudinal case study, this paper illustrates how these practices are played out in the particular context of a management consulting firm and explores the relationship between branding and organizational identity and identification. The study highlights the shortcomings of the strategic marketing perspective on brands and the need for further empirical studies that examine the role of branding from different perspectives and in different empirical contexts.
Ferric oxides in East Candor Chasma, Valles Marineris (Mars) inferred from analysis of OMEGA/Mars Express data: Identification and geological interpretation

[1] The mineralogical composition of the Martian surface is constrained by analyzing the data of the OMEGA visible and near infrared imaging spectrometer onboard Mars Express. Ferric signatures had previously been reported in Valles Marineris, Margaritifer Terra, and Terra Meridiani. Here we use three independent data reduction methods (Spectral Angle Mapper, a modified Spectral Mixture Analysis and Modified Gaussian Model) to detect and map ferric oxides in East Candor Chasma, a part of Valles Marineris. Ferric oxides in East Candor Chasma are concentrated in scattered formations. MOLA altimetry indicates that the ferric oxides are preferentially located in topographic lows. THEMIS, HRSC and MOC images show that the ferric oxide spectral signatures are systematically correlated with superficial deposits of low albedo, located at the foot of, or resting on Interior Layered Deposits (ILDs). This spatial distribution suggests that ferric oxides are genetically linked to ILDs. Gravity and wind-driven remobilization of ferric oxides previously formed in the ILDs can explain their accumulation around the ILDs.
Pseudo-rigid Body Modeling of IPMC for a Partially Compliant Four-bar Mechanism for Work Volume Generation

Conventional four-bar crank rocker mechanisms made of rigid links can generate only one path, at the rocker tip, for one revolution of the crank. However, if the rocker length can be actively changed then its tip can generate a work volume. This study describes an application of ionic polymer metal composite (IPMC) as a partially compliant rocker in a four-bar mechanism for work volume generation. First, an experiment is conducted to study the voltage verses bending characteristics of IPMC and based on the experimental data the IPMC is modeled using a pseudo rigid body model. The model is based on the fix-pin support type of cantilever mode and its derivation is explained in detail. The maximum and minimum length of the rocker is controlled by changing the voltage applied to it and this generates a work volume for one revolution of the crank. Simulation results are compared with the experimentally obtained work volume and the differences are found. The proposed mechanism has the potential for application in micro positioning, compliant structures, etc.
PRESCRIBING A FOURTH ORDER CONFORMAL INVARIANT ON THE STANDARD SPHERE — PART I: A PERTURBATION RESULT

In this paper we study some fourth order elliptic equation involving the critical Sobolev exponent, related to the prescription of a fourth order conformal invariant on the standard sphere. We use a topological method to prove the existence of at least a solution when the function to be prescribed is close to a constant and a finite dimensional map associated to it has non-zero degree
NON-LINEAR ANALYSIS OF CAPACITOR MOTOR USING THE ANISOTROPIC FIELD MODEL

The split-phase motors (with capacitor or resistance) are usually low power machines and are widely used for both industrial and home appliances. For the analysis of this motors have been extensively developed a wide variety of analytical models [1, 2, 3, 4] based on rotating-field theory or two-axes theory. This circuit models usually assume that the magnetic core have infinity (or constant) permeability. In reality there is a clear nonlinear interdependence between the currents and the impedances (or fluxes). Many tests shows that the iron saturation must be taken into account in the motor model otherwise there is a discordance between the computed and measured values. In [5], the iron saturation is taken into account by computing the positive-sequence impedance by an iterative procedure. Because of high levels of main flux path saturation it is necessary to implicate in the problem a field model. The finite element models (FEM) are commonly used for induction machine analysis, but prohibitive computing time required by FEM limits their use to special cases. In [6] is explained how the finite element techniques can be used when iron saturation is included. In this paper a combined circuit-field model of capacitor motor with cage rotor is presented. The field model is interfaced with the circuit equations (two-axes model) such that to compute more precisely the nonlinear magnetization characteristic (induced voltage versus resultant magnetizing current).
GENETIC TRANSFORMATION OF CERATOTHECA TRILOBA FOR THE PRODUCTION OF ANTHRAQUINONES FROM HAIRY ROOT CULTURES

Background: Ceratotheca triloba was found to contain three anthraquinones (9, 10-anthracenedione, 1-hydroxy-4-methylanthraquinone and 5, 8-dimethoxy-2, 3, 10, 10a-tetrahydro-1H, 4aH-phenanthrene-4, 9-dione [DTP]) in its roots. Inhibition of the human topoisomerase II enzyme is the basis of some currently used cancer drugs such as doxorubicin which is shown to be cardio-toxic. For this reason we decided to investigate anthraquinones from C. triloba as a possible anticancer drug, however the main limitation was the large quantities of roots that are required to obtain a good yield of the active compound. Therefore the aim of this research was to obtain a higher yield of anthraquinones in hairy roots cultures than the parent plant as well as to compare yields of hairy root, cell suspension and shoot cultures. Materials and Methods: Protocols for seed sterilization, seed germination, shoot cultivation, callus induction, A. rhizogenes mediatedtransformation and hormone supplementations of hairy roots were developed. Results:The results revealed that stem explants was susceptible to transformation by Agrobacterium rhizogenes at a low optical density of 0.2. Induced hairy roots were decontaminated by exposure to cefotaxime at 500mg.l-1 for five days and then 200mg.l-1 for eight days. Visualization of culture extract profiles by TLC revealed anthraquinones were present in all cultures. Analysis of the culture extracts by HPLC showed the highest yield of anthraquinones was produced in hairy root cultures supplemented with 1-Naphthaleneacetic acid [NAA] (8 mg). This was a 17 fold increase compared to field roots (0.47 mg). Conclusion:Therefore C. triloba hairy root cultures are the preferable biological system for anthraquinones production over shoot (0.13 mg) and cell suspension cultures (0.70 mg).
DA Based Systematic Approach Using Speculative Addition for High Speed DSP Applications

In recent years Parallel-prefix topologies has been emerged to offer a high-speed solution for many DSP applications. Here in this paper carrier approximation is introduced to incorporate speculation in Han Carlson prefix method. And overall latency is considerably reduced using single Brent-Kung addition as a pre and post processing unit. In order to improve the reliability error detection network is combined with the approximated adder and it is assert the error correction unit whenever speculation fails during carries propagation from LSB segment to MSB unit. The proposed speculative adder based on Han-Carlson parallel-prefix topology attains better latency reduction than variable latency Kogge-Stone topology. Finally, multiplier-accumulation unit (MAC) is designed using serial shift-based accumulation where the proposed speculative adder is used for partial product addition iteratively. The performance merits and latency reduction of proposed adder unit is proved through FPGA hardware synthesis. Obtained results show that proposed MAC unit outperforms both previously proposed speculative architectures and all other high-speed multiplication methods.
Typology of Thracian horses according to osteological analysis of skeletal remains and depictions from the antiquity

skeletal remains of about 15 horses from the antique Thracian mounds were compared in terms of habitus and height at the shoulders. Additional data about the habitus of the Thracian horse were received from the analysis of more than 1000 depictions of horseman and horses from the same epoch. The breeds of the Thracian horse from the recent Bulgarian territories during the antiquity (after skeletons from IV-III century B.C.) were mostly semi-thin legged to thin-legged (following the classification of Brauner, 1916). All these horses have similarity with the ancient and recent eastern breeds: relatively small-sized as a whole, frequently with slender legs (after metapodials and especially metatarsals), adapted to fast allures. The height at the shoulder varied significantly – from 125 to 150 cm. According the classification of Vit (1952), the bred horses were usually smallto medium-sized. Based on the osteological material and the studied depictions we could conclude that in general the horses from the Thracian time (including the Roman epoch) were relatively robust, with strong skeletal system and compact, embossed muscles, large head, strong neck and short, upright mane. All of these are primitive features inherited from the wild ancestors. The studied material had similarities with the Arabian horse, but in general it was a little bit more robust and its height at the shoulder was smaller than the recent Arabian horse. The most frequent images of Thracian horses from the antiquity of Bulgaria and the Balkans represent exactly this kind of horse. such horses would be suitable for hunting, especially in the varied relief, typical for the Bulgarian/Balkan lands. Most of the Thracian horses from the studied age (judging from the sample) probably could not reach the height, the slenderness and the running ability of the recent Arabian horses, which have been selected over a long period of time. At the same time, it is important to note that the elite Thracian horses had attained the parameters of the Arabian horse, especially its height and slenderness.
Learner-generated drawings in physics education

ii Tiivistelmä . iii Acknowledgements . iv 1. Representations and models in physics education . 2 1.1 Defining the concepts . 2 1.2 The connection between representations and models . 7 1.3 Studies about multiple representations in learning science . 9 2. Sociocultural view of learning . 11 2.1 Sociocultural theory and the ZPD . 11 2.2 Sociocultural discourse analysis . 13 2.3 Scaffolding and guidance . 13 2.4 Peer group talk and collaborative work . 14 3. Drawing as a representation in science . 17 3.1 Drawing as a representation . 17 3.2 The generative theory of drawing construction . 18 3.3 Drawing in science . 19 3.4 The need for guidance in drawing . 20 3.5 Empirical studies about guidance in drawing . 22 4. Tablet computers and education research . 24 4.1 What is a tablet computer? 24 4.2 Tablet computers compared to other devices . 24 4.3 The Educreations application . 25 5. Pressure and the kinetic theory of gases . 28 5.1 The definition of pressure . 28 5.2 The kinetic theory of gases . 29 5.3 Misconceptions about pressure . 30 6. Research questions . 32 7. The study . 33 7.1 The outlines of the study . 33 7.2 Method for the study of the students’ talk . 36 7.3 Method for the study of the student’s drawings . 39 7.4 Methods for answering the research questions . 40 8. Results . 43 8.1 Quantitative analysis of the drawings . 43 8.2 Qualitative analysis of the drawings . 46 8.2.1 Assignment A1 . 46 8.2.2 Assignments A2 and A3 for the AS group . 48 8.2.3 Assignment B1 . 50 8.2.4 Assignment B2 . 54 8.3 Analysis of the students’ talk . 55 8.3.1 Disputational talk . 56 8.3.2 Cumulative talk . 57 8.3.3 Exploratory talk . 59 9. Discussion . 61 References . 66 Appendix 1: The study form for the AS group . 72 Appendix 2: Co-occurrences of codes and talk types . 81
Langevin Markov Chain Monte Carlo with stochastic gradients

Monte Carlo sampling techniques have broad applications in machine learning, Bayesian posterior inference, and parameter estimation. Often the target distribution takes the form of a product distribution over a dataset with a large number of entries. For sampling schemes utilizing gradient information it is cheaper for the derivative to be approximated using a random small subset of the data, introducing extra noise into the system. We present a new discretization scheme for underdamped Langevin dynamics when utilizing a stochastic (noisy) gradient. This scheme is shown to bias computed averages to second order in the stepsize while giving exact results in the special case of sampling a Gaussian distribution with a normally distributed stochastic gradient.
Can traditional games be an option in increasing the physical activity of women following mastectomy?

Summary Study aim: the purpose of the present study was to investigate the potential of traditional games as a method of increasing the physical activity (PA) of women following mastectomy. A cross-sectional survey during the 20th ONCO Games was conducted and the sample included data from women divided into two groups: up to 50 years old (n = 26) and over 50 years old (n = 86). Material and methods: PA was assessed using a questionnaire, and the number of steps taking during 30-minute periods was measured using pedometers during each of the games. Exertion was evaluated using Borg’s Scale. Results: there was no difference in levels of coherence between the age groups. The group of younger women were statistically more active (M = 3.34 days/week) than the older group (M = 2.77 days/week). All the games were evaluated to be of light intensity, with ringo perceived as being statistically more fatiguing in the over 50 age group. The highest number of steps was performed during the game of ring-net-ball (M = 1903 steps/30 min) in both age groups, with older women performing statistically more steps. Similar situations were observed in the cases of pétanque and speedminton. In ringo, the situation was reversed. The lowest number of steps was recorded in pétanque in the younger age group (M = 296 steps/30 min). Conclusion: this study indicates that in the rehabilitation and recovery process after mastectomy, traditional games could be a bridging link between exercising and sports as they provide not just activity but also a unique and valuable social context.
A joint selective maintenance and multiple repair-person assignment problem

It is common in many industrial settings to have large multicomponent systems perform consecutive missions interspersed with finite breaks during which a limited set of component repairs or replacements can be carried out due to limited time, budget, or resources. The decision maker then has to decide which components to repair in order to guarantee a pre-specified performance level. This is known as the selective maintenance problem. This paper introduces a novel variant of the selective maintenance problem for a multi-component system performing consecutive missions separated by scheduled finite breaks by specifically modelling the assignment of the repair tasks to multiple repair-persons. Current models in the literature usually assume that only one repair channel is available or that the assignment optimization can be done at a subsequent stage. A novel integrated nonlinear programming formulation is proposed and optimally solved. Numerical experiments show the benefits of jointly carrying out the assignment of the tasks to repair-persons and the selection of the components to be repaired.
The Role of Immovable Property Taxes in the EU Countries – Taxes on Land, Buildings and Other Structure in Sub‑national Tax Revenues under the Conditions of Tax Decentralization

The literature concerned in fiscal federalism and fiscal decentralization promotes the sub‑national responsibility for sub‑national resources and spending. In this paper sub‑national tax revenues are compared to total tax revenues expressing the tax decentralization for the sample of EU 28 countries. Beside it, the main part of sub‑national taxes, the immovable property tax – tax on land building or other structure, is compared to total sub‑national tax revenues. Using the GMM system estimation determinants of sub‑national tax revenues, real estate tax revenues and tax decentralization are investigated on the sample of EU countries. Results show the significant negative relation between GDP per capita growth, population density and inflation rate and all variables in question. In the case of sub‑national government real estate tax revenues the positive relation with public debt is observed.
Identifying Organizational Competencies in Project Oriented Companies – an evolutionary approach

Building on the work of Prahalad and Hamel (1990), many methodologies have been proposed in the strategic management literature for the identification of organizational level core competencies (Bakker et al., 1994; Tampoe, 1994; Gallon et al., 1995; Coates et al., 1997; Marino, 1996 and Javidan, 1998). All of them have two major drawbacks: i) they do not take into account the path dependent nature of organizational level core competencies (OLCCs) and ii) are not operationalized for a project - oriented company context like that of construction. The methodology proposed here supplements existing ones, by addressing the evolutionary dimension of OLCC development, taking under consideration path dependency and idiosyncrasy issues. In addition, the incorporation of management of projects theory (King, 1988; Artto and Dietrich, 2004; Jamieson and Morris, 2004; Morris, 2004) into the proposed methodological framework operationalizes it for the project-oriented company (Gareis, 2004) nature of construction majors.
The integration of entrepreneurial orientation and dynamic capabilities in dynamic environment of small and medium enterprises (Nigeria’s export firms)

Small and medium enterprises (SMEs) in developing countries most especially in Nigeria have performed below expectation in their important roles of promoting and developing economic growth. This poor performance has been of great concern and disturbance to all the stakes holders (government at all levels, professionals, public and private sectors and international agencies). Responses to this critical situation culminated to yearly budgetary allocation, favorable policies, favorable pronouncement incentives and regulations giving by local government, state government and federal government.These efforts and interest of different levels of government and even international agencies to make SMEs sub-sector to be vibrant and leave to their expectation indicated that the crucial roles of SMEs are recognized and acknowledged for nation’s building. However, the situation become more disturbing, confusing and critical when the degree of poverty, unemployment and hunger that SMEs supposed to reduce continue to increase at alarming rate, in spite of all drastic measures and incentives provided yearly.This study realized it is high time to proffer sustainable solutions to SMEs particularly, introducing entrepreneurial orientations and dynamic capabilities as key variables that are necessary to improve the export performance of SMEs, building on the previous literatures that suggested the need for strategic orientations in order to exact great effect on firm performance in dynamic environment and recommend renewal and reconfiguration for SMEs.
Three-dimensional flexural modelling of the Ebro Basin (NE Iberia)

Summary The Ebro Basin, the southern foreland basin of the Pyrenees, has undergone a complex evolution in which, apart from the Pyrenees, the Iberian Range and the Catalan Coastal Ranges have played an important role, both as sediment sources and as basin confining structures. The deflected basement underlying the Ebro Basin dips north, suggesting a lithospheric-scale control on the structure of this basin. This is compatible with the results of subsidence analyses, which show that the study area is not in a local mode of isostatic compensation. In order better to understand the mechanisms that led to the present configuration of the Ebro Basin, and particularly the relevance of the various kinds of (un)loading (e.g. surrounding fold-and-thrust belts, basin topography, subsurface loads), we carried out a 3-D kinematic modelling study that accounts for the flexural state of the lithosphere, subjected to various loads applied at its lateral boundaries, and the sedimentary fill of the basin. We also included the effect of Neogene extensional tectonics along the eastern basin margin, which is related to the opening of the Valencia Trough. We show the suitability of the 3-D lithospheric-scale flexural modelling approach to the study of NE Iberia. Modelling results point to a relatively strong lithosphere in this area, with values of effective elastic thickness ranging from 10 to 35 km in the Ebro Basin, increasing towards the Pyrenees. We also find that the topographic (tectonic) load itself is insufficient to explain the observed basement deflection. Thus an extra subsurface load beneath the Pyrenees, corresponding to the underthrusted Iberian lithosphere, is required. The effect of lithospheric stretching in the Valencia Trough on the Ebro Basin is appreciable only in its eastern part, where the lithosphere was uplifted. This had considerable repercussions on the sedimentary and erosional regime of the Ebro Basin. We have analysed the link between the stretching-related, tectonically uplifted areas and the erosional patterns observed onshore northeast Iberia.