bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Early Byzantine Circular Forum in Dyrrachium (Durrës, Albania) in 2002 and 2004–2005: Recent Recording and Excavation
Authors: Hoti Afrim , Wilkes John , Metalla Elvana , Shkodra Brikena 
Published: June 2011

Excavations a decade ago in the centre of the city of Durrës (ancient Dyrrachium) in Albania revealed an extensive complex of concentric structures of the Late Roman and Early Byzantine eras. Initially identified as a market complex (macellum) of a type known in numerous Roman cities, it also became apparent that the circular paved area 40 m diameter within a colonnade at the centre represented a space intended for more formal activities and was most likely a Forum comparable with the Curved Forum at Constantinople. A central focus of the area was a rotundac.5.75 m diameter that may have supported monumental statuary or possible a column. In 2001 a record was made of the architectural remains and in 2004 and 2005 two unfinished trenches adjacent to the Rotunda were enlarged and completed. The dating evidence recovered from beneath the level of the Forum paving indicated a construction date around the end of the sixth century, making it likely that it was one of the embellishments conferred on his native city by the emperor Anastasius (491-518).Οι προ δεκαετίας ανασκαφές στο κέντρο της πόλης του Δυρραχίου στην Αλβανία αποκάλυψε ένα εκτεταμένο συγκρότημα κυκλικών κατασκευών των Ύστερων πωμαϊκών και των ∏ρώιμων Βυζαντινών χρόνων. Μολονότι εξ' αρχής το συγκρότημα χαρακτηρίστηκε ως αγορά (macellimi), ο τύπος της οποίας συναντάται σε πολλές Ρωμαϊκές πόλεις, έγινε επίσης φανερό, ότι ο πλαισιωμένος με περιστύλιο κυκλικός πλακόστρωτος χώρος διαμέτρου 40 μ αντιπροσώπευε στο κέντρο του ένα χώρο, ο οποίος προοριζόταν περισσότερο για επίσημες δραστηριότητες, ταυτιζόμενος κατά πάσα πιθανότητα με αγορά (Forum), εάν συγκριθεί με την Κυρτή Αγορά της Κωνσταντινούπολης. Το επίκεντρο του χώρου ήταν μία ροτόντα με διάμειρο 5·75 μ κατά προσέγγιση, η οποία ίσως να στήριζε ένα μνημειακό σύμπλεγμα αγαλμάτων ή πιθανώς έναν κίονα. Το έτος 2001 δημιουργήθηκε ένα αρχείο για τα αρχιτεκτονικά κατάλοιπα και κατά τα έτη 2004 και 2005 δύο μη ολοκληρωμένες ανασκαφικές τομές, παρακείμενες της ροτόντας, επεκτάθηκαν και ανεσκάφησαν πλήρως. Τα δεδομένα χρονολόγησης, που συλλέχθηκαν κάτω από το επίπεδο του πλακόστρωτου της αγοράς τοποθετούν την οικοδόμησή της περί τα τέλη του 60υ αι. μ.Χ., συνηγορώντας προς την άποψη, ότι πιθανώς πρόκειται για ένα από τα αφιερώματα, που πρόσφερε στη γενέτειρά του, ο Αυτοκράτωρ Αναστάσιος (491–518 μ.Χ.).
Mycenae and Tiryns: the Pottery of the Second Half of the Thirteenth Century BC - Contexts and Definitions
Authors: French Elizabeth B. , Stockhammer Philipp W. , Damm-Meinhardt Ursula 
Published: June 2011

Since 1950 widespread and important excavation has taken place in the Argolid. For Mycenae and Tiryns much of the post-excavation study has now been completed but has not yet reached final publication. The use of material from the preliminary reports has, however, led to conclusions which are not justified. The study teams at both sites, working in close collaboration, present here the detailed stratigraphie background to their work and the definitive assignments produced. The diagnostic pottery for the second half of the thirteenth centurybc(LH III B2 Early and Late), which culminated in a major destruction at each site, is illustrated with its contextual background. The relationship between the two sites can thus be accurately assessed and the evidence will enable well-founded historical hypotheses.Από το 1950 εκτεταμένες και σημαντικές ανασκαφικές έρευνες έχουν λάβει χώρα στην Αργολίδα. Για τις Μυκήνες και την Τίρυνθα ένα μεγάλο μέρος της μετα-ανασκαφικής μελέτης έχει πλέον ολοκληρωθεί δίχως ωστόσο να έχει φτάσει στο τελικό στάδιο της δημοσίευσης. Η χρήση υλικού από τις προκαταρκτικές εκθέσεις έχει ωστόσο οδηγήσει σε συμπεράσματα, τα οποία δεν μπορούν να τεκμηριωθούν. Οι ερευνητικές ομάδες των δύο θέσεων, στενά συνεργαζόμενες, παρουσιάζουν στο άρθρο αυτό το λεπτομερές στρωματογραφικό πλαίσιο της εργασίας τους και τις τελικές εκθέσεις. Η διαγνωστική κεραμική για το δεύτερο ήμισυ του δέκατου τρίτου αιώνα π.Χ. (YE III B2 Πρώιμη και Ύστερη), περίοδος που σημαδεύτηκε αηό μία μεγάλη καταστροφή και στις δύο θέσεις, επεξηγείται στο πλαίσιο των συνευρημάτων της. Η σχέση των δύο θέσεων μπορεί με αυτόν τον τρόπο να αξιολογηθεί με μεγαλύτερη ακρίβεια. Τα στονχεία αυτά θα επιτρέψουν τη διατύπωση καλά θεμελιωμένων ιστορικών υποθέσεων.
Structural stability of attractor–repellor endomorphisms with singularities
Authors: BERGER PIERRE 
Published: June 2011

AbstractWe prove a theorem on the structural stability of smooth attractor–repellor endomorphisms of compact manifolds, with singularities. By attractor–repellor, we mean that the non-wandering set of the dynamics f is the disjoint union of an expanding compact subset with a hyperbolic attractor on which f acts bijectively. The statement of this result is both infinitesimal and dynamical. To our knowledge, this is the first in this hybrid direction. Our results also generalize Mather’s theorem in singularity theory, which states that infinitesimal stability implies structural stability for composed mappings to the larger category of laminations.
Convergence of moments for Axiom A and non-uniformly hyperbolic flows
Authors: MELBOURNE IAN , TÖRÖK ANDREI 
Published: June 2011

AbstractIn the paper, we prove convergence of moments of all orders for Axiom A diffeomorphisms and flows. The same results hold for non-uniformly hyperbolic diffeomorphisms and flows modelled by Young towers with superpolynomial tails. For polynomial tails, we prove convergence of moments up to a certain order, and give examples where moments diverge when this order is exceeded. Non-uniformly hyperbolic systems covered by our result include Hénon-like attractors, Lorenz attractors, semidispersing billiards, finite horizon planar periodic Lorentz gases, and Pomeau–Manneville intermittency maps.
Differentiating potential functions of SRB measures on hyperbolic attractors
Authors: JIANG MIAOHUA 
Published: June 2011

AbstractThe derivation of Ruelle’s derivative formula of the SRB measure depends largely on the calculation of the derivative of the unstable Jacobian. Although Ruelle’s derivative formula is correct, the proofs in the original paper and its corrigendum are not complete. In this paper, we re-visit the differentiation process of the unstable Jacobian and provide a complete derivation of its derivative formula. Our approach is to extend the volume form provided by the SRB measure on local unstable manifolds to a system of Hölder continuous local Riemannian metrics on the manifold so that under this system of local metrics, the unstable Jacobian becomes differentiable with respect to the base point and its derivative with respect to the map can be obtained by the chain rule.
An efficient diagnosis algorithm for inconsistent constraint sets
Authors: Felfernig A. , Schubert M. , Zehentner C. 
Published: June 2011

AbstractConstraint sets can become inconsistent in different contexts. For example, during a configuration session the set of customer requirements can become inconsistent with the configuration knowledge base. Another example is the engineering phase of a configuration knowledge base where the underlying constraints can become inconsistent with a set of test cases. In such situations we are in the need of techniques that support the identification of minimal sets of faulty constraints that have to be deleted in order to restore consistency. In this paper we introduce a divide and conquer-based diagnosis algorithm (FastDiag) that identifies minimal sets of faulty constraints in an overconstrained problem. This algorithm is specifically applicable in scenarios where the efficient identification of leading (preferred) diagnoses is crucial. We compare the performance of FastDiag with the conflict-directed calculation of hitting sets and present an in-depth performance analysis that shows the advantages of our approach.
The gradient nature ofs-lenition in Caleño Spanish
Authors: File-Muriel Richard J. , Brown Earl K. 
Published: June 2011

AbstractWhereas previous studies of Spanishs-weakening have relied on impressionistic coding, the present study examines temporal and gradient acoustic details in the production of /s/ by eight females from Cali, Colombia, during sociolinguistic interviews. We propose a metric for quantifyings-realization by employing three scalar-dependent variables:s-duration, centroid, and voicelessness. The results of linear regressions indicate that the dependent variables are significantly conditioned by local speaking rate, word position, following and preceding phonological context, stress, and lexical frequency. This study sheds light on how each independent variable influencess-realization acoustically. For example, as local speaking rate increases, duration, centroid, and voicelessness decrease, which is indicative of lenition, and the same weakening tendency is observed when /s/ occurs in word-final position or is followed by a nonhigh vowel, whereas frequency contributes only tos-duration. We discuss the advantages of opting for instrumental measurements over symbolic representation.
A Review of the Statutory Valuation of Long-Term Insurance Business in the United Kingdom
Authors: Wright P.W. , Burgess S.J. , Chadburn R.G. , Chamberlain A.J.M. , Frankland R. , Gill J.E. , Lechmere D.J. , Margutti S.F. 
Published: June 2011

ABSTRACTThis paper considers the approaches currently used by life offices for statutory valuations, and proposes a number of changes to current practice. It builds on the earlier work of Philip Scott's Working Party and a working party which reported on all aspects of unitised with-profits business to the 1996 CILA conference.Recommendations are made for each of the major categories of long-term business, in particular for the introduction of a bonus reserve standard for accumulating with-profits business, whilst retaining the net premium standard for conventional with-profits business. It is proposed that the current net premium approach for non-profit business should be replaced by a gross premium method. The paper also develops a greater codification of the calculation of non-unit reserves on linked business.Considerable emphasis is placed on the requirement for statutory reserves to have regard to PRE. It is assumed throughout that the E.C. Third Life Directive remains in its current form.A number of examples are provided which illustrate the proposed method for accumulating with-profits business. Appendices to the paper include a draft of suggested consequential changes to the Insurance Companies Regulations 1994, and a revised supporting version of the whole of GN8.
A Stochastic Model Underlying the Chain-Ladder Technique
Authors: Renshaw A.E. , Verrall R.J. 
Published: June 2011

ABSTRACTThis paper presents a statistical model underlying the chain-ladder technique. This is related to other statistical approaches to the chain-ladder technique which have been presented previously. The statistical model is cast in the form of a generalised linear model, and a quasi-likelihood approach is used. It is shown that this enables the method to process negative incremental claims. It is suggested that the chain-ladder technique represents a very narrow view of the possible range of models.
Non-Parametric Likelihood Enhancements to Parametric Graduations
Authors: Thomson R.J. 
Published: June 2011

ABSTRACTParametric graduation may fail to achieve satisfactory results without overparameterisation. Whittaker-Henderson graduation tends to constrain the graduated values towards a low-order polynomial. Non-parametric methods do not generally make direct use of true likelihood functions. This paper suggests a method of enhancing the likelihood of a parametric graduation by means of non-parametric methods, thus reducing the disadvantages of both methods.The parametric graduation is taken to be ideally smooth by definition and is adjusted by using constrained maximum likelihood estimation to obtain better fidelity to the experience. The constraint imposes a minimum sacrifice of smoothness, in terms of a quantitative smoothness criterion, from the initial ideal. The method is not entirely objective in that, in some cases, professional judgement is required in order to assess the degree of smoothness that can be imposed. In other cases the method provides an objective optimum. In either case, by quantifying the degrees of departure from perfect fidelity and from ideal smoothness, the suggested method provides useful and theoretically sound criteria for the purposes of the optimisation process. In particular, by inverting the parametric graduation formula for the purposes of defining the smoothness criterion, the method ensures that the smoothness criterion is consistent over the whole age range, thus resolving the main objection to non-parametric graduation.The method is applied to the 1979-82 experience for life office pensioners in the United Kingdom with positive results.
Francis Baily: Another Astronomer and Actuary
Authors: Heywood Geoffrey 
Published: June 2011

ABSTRACTOn the occasion of the forthcoming total eclipse of the sun in Devon and Cornwall on 11 August 1999, the name of Baily is likely to receive much publicity because of the accompanying phenomenon of Baily's Beads. The paper explains Baily's Beads and also summarises the very considerable contribution which he made to actuarial science in the early days.
An Analysis of the Level of Security Provided by the Minimum Funding Requirement
Authors: Cairns A.J.G. 
Published: June 2011

ABSTRACTIn this paper we investigate the effectiveness of the Minimum Funding Requirement (MFR) (pre-1999 version) under random future investment conditions. In particular, do the various liabilities calculated under the MFR deliver a suitable level of security to pension scheme members?The paper considers active (and deferred) members and current pensioners separately.For active members, Monte Carlo simulation is used to compare how the proceeds arising from investment of the pre-1999 MFR liability in an equity-backed personal pension would compare with the deferred pension promised by the scheme. It is found that, while there may be the intended 50% chance that the personal pension has a better outcome, there are very substantial downside risks for younger members. Investment strategies based upon index-linked gilts are shown to result, on average, in lower personal pensions, but they provide an extremely effective means of limiting the downside risks.For pensioners, Monte Carlo simulation is used to find the distribution of the initial amount of assets required to pay off precisely the pension liabilities as they arise. This investigation considers the effectiveness of the 12-year rule and different investment strategies. The 12-year rule in combination with an equivalent investment strategy is shown to provide reasonable security for a typical group of pensioners. However, if investments are restricted to an appropriate mixture of gilts then the level of security for pensioners is much increased. In particular, we investigate the use of value-at-risk reserves. It is found that 95% value-at-risk reserves are lower for a mixed conventional/index-linked gilts strategy than a mixed gilts/equity strategy.It is argued, because of the high degree of downside risk, that there is no place in MFR calculations for high, anticipated equity returns. Instead rates of interest should be based solely upon fixed-interest and index-linked gilt yields.
Developing an International Accounting Standard for Life Assurance Business
Authors: Forfar D.O. , Masters N.B. 
Published: June 2011

ABSTRACTThere is currently no international standard for profit reporting in life insurance companies. The paper sets out the issues which an international standard for life companies will need to address, bearing in mind compatibility with existing International Accounting Standards, in particular IAS 32 Financial Instruments: disclosure and presentation, IAS Exposure Draft E62 (now IAS 39); Financial instruments; recognition and measurement and the discussion paper of March 1997 prepared by the Steering Committee on Financial Instruments entitled ‘Accounting for Financial Assets and Financial Liabilities’. The paper discusses possible approaches to the issues which arise and comments on each, ending with some final conclusions.
Recent Developments in Directors' Duties (Staple Inn Reading 1999)
Authors: Arden Mary 
Published: June 2011

ABSTRACTCompany directors play a key role in any company and thus in the contribution which business makes to the economy and to society. Reform of company law is being actively debated. This places under the spotlight such questions as should directors' duties be made clearer? Should directors only owe duties to their shareholders? Are directors adequately monitored, for example in corporate activities, pay and political donations? The object of the lecture is to review areas of current debate and identify areas where changes are occurring or may occur.
A Non-Linear Stochastic Asset Model for Actuarial Use
Authors: Whitten S.P. , Thomas R.G. 
Published: June 2011

ABSTRACTThis paper reviews the stochastic asset model described in Wilkie (1995) and previous work on refining this model. The paper then considers the application on non-linear modelling to investment series, considering both ARCH techniques and threshold modelling. The paper suggests a threshold autoregressive (TAR) system as a useful progression from the Wilkie (1995) model. The authors are making available (on compact disk) a collection of spreadsheets, which they have used to simulate the stochastic asset models which are considered in this paper.
Property Investment Appraisal
Authors: Adams A.T. , Booth P.M. , MacGregor B.D. 
Published: June 2011

ABSTRACTThis paper considers the application of discounted cash flow (DCF) techniques to the analysis of the property investment market. The traditional method of property valuation is briefly outlined and its shortcomings highlighted. An alternative DCF procedure is derived to calculate the present value of a property investment. This method will be familiar to actuaries, but is not always used in property disciplines. The sensitivities of this formulation to changes in the force of real interest, force of real rental growth and force of inflation are derived. It is suggested how these formulae may be used for property investment appraisal and risk analysis. We conclude that DCF offers a more flexible and accurate means of estimating the value of a property, and that property valuers, financial economists and actuaries should work jointly to develop practical DCF methods. However, so long as traditional methods of valuation prevail, a rational investor must use both methods to identify mispriced property assets. There have been few property contributions to the actuarial literature in the United Kingdom; this paper is intended to build on the few previous papers and suggests directions for future work.
Address by the President of the Institute of Actuaries: Turning Promises into Reality
Authors: Daykin Christopher David 
Published: June 2011

ABSTRACTThe Presidential Address gives a broad overview of the development of the actuarial profession's role in its principle areas of activity. Actuaries play important roles in life insurance and pensions, but there are some major new challenges facing the profession in these areas. General insurance has been slow to develop, but is now likely to be the fastest growing part of the profession with a steadily expanding role. Finance and investment also offer major fields where actuaries could be more influential. With continuing growth expected in the number of qualified actuaries, it will also be important to move into wider fields. The new President challenges the profession to give proper priority to the public interest and to ensure that actuaries are worthy of the trust which is placed in them.
An Introduction to Offshore Life Assurance Business
Authors: Boal G.F. , Tyrer L.S. 
Published: June 2011

ABSTRACTOver the last 10 years, in centres surrounding the United Kingdom, a cross-border insurance industry has been developing — an industry which is exporting British expertise in life assurance and investment products on a large scale to a world-wide market.The industry is offshore life assurance. The purpose of this paper is principally to outline what this industry is and why it exists.The particular financial management and operational management issues resulting from this activity are highlighted and explored in subsequent sections. The paper concludes with an assessment of market trends and future development in what is a very young, dynamic and highly competitive market.
Pension Fund Asset Valuation and Investment
Authors: Dyson A.C.L. , Exley C.J. 
Published: June 2011

ABSTRACTThe theoretical basis for, and practical application of, the discounted income method for valuing UK pension fund assets is discussed, with particular reference to the widely adopted application to variable income (equity type) assets, as proposed by Day & McKelvey (1964), in the context of both the management and compliance objectives of pension fund valuation. An alternative methodology is proposed in which consistency with assets, liabilities, and market values is demanded, with smoothing of the valuation result achieved on an explicit rather than implicit basis. It is then demonstrated that the explicit smoothing parameter can be set so as to achieve the historic smoothness framework for establishing pension fund investment policy.In conclusion the paper suggests greater emphasis on market-related methodologies for compliance valuations and leaves open the choice of methodology for management valuations and monitoring purposes, on the grounds that there is a large subjective element in any realistic basis. However, it is demonstrated that while smoother than unadjusted market-related methods, other aspects of the dynamics of the funding level under the method of Day & McKelvey can be perverse and it is suggested that this method should not be allowed to dictate investment decisions.
Corporate Decisions in General Insurance: Beyond the Frontier
Authors: Cumberworth M. P. , Hitchcox A. N. , McConnell W.D. , Smith A.D. 
Published: June 2011

ABSTRACTThis paper shows how the powerful and flexible tool of stochastic modelling can be applied to a range of business decisions extending far beyond the asset allocation solutions that are common to many asset/liability modelling studies. The example used to demonstrate these techniques is a general insurance case study, but similar principles can be extended to many different business situations. At each stage of the analysis we consider the implications of modern financial theory on the management decision process together with a practical perspective on observed behaviour in the real world. Opportunities are taken to suggest directions in which further research may be of benefit to the actuarial profession.
Professions in Society
Authors: Bellis C.S. 
Published: June 2011

ABSTRACTActuaries should seek to understand the phenomenon of ‘professions’ because much of our working life is influenced by the belief that we are a ‘profession’. This paper considers various theories as to why professions exist — do they arise naturally to fulfil functions in society, or are they created by the efforts of the occupational groups which aspire to become professions? Professions are shaped by the society of which they are a part. Ongoing changes in society are affecting professions in general, and the actuarial profession in particular. The difficulties which the actuarial profession will face as it seeks to expand beyond its traditional territory are discussed. Finally the author speculates on what institutional forms might replace professions in the twenty-first century.