What is the Future of Strategic Management?

The history of planning and creating strategies has a past of over half a century. Throughout this lifetime period we have witnessed both the evolution of theory and practice. The MBA study books in the last-third of the 20th century have with predilection exhibited this very process as a complex of monetary centered budget planning, forecast-based planning, strategic planning and strategic management. There might be a controversy existing about the naming, characteristics and timing of these different sections but there is an accordance that the changes that we have taken place in the last decade as a whole without a doubt can be derived from these very changes in the business environment or in some outstanding cases (like 9/11) they can be acknowledged as the ability of corporate foreseeing and the ability to adapt to the vision of the future. The main purposes of the research is to provide a summarized picture about the changing process of this procedure during last decades as far as the planning and creating strategies are concerned and also their milestones and periods. Try to explore and systemize the very aspects of these changes. The happenings of the first decade of the new millennium are outstandingly interesting if we consider their real effect on the theory and practice of strategic management. Let us remember the euphoria around the year 2000, the predictions of „new technologies”, „new economy”, „new organization” and „new leadership”. We have implied before on the destruction of the twin towers of the World Trade Center which meant a new era, a new quality of international terrorism and its consequences (Afghanistan, Iraq). But the „product” of this decade is the strategic aim that companies focus on, which is the social responsibility regarding the unavoidance of the effects of climate change on the long run. During the research the big question has risen concerning how did the science of strategic management do as far as the predictions of the global monetary and economic crisis are concerned? And also its solutions this very science has to offer in order to handle and get over the crisis. Does it conclude from the answers given to the questions that a change in paradigms are necessary, a new quality is needed or may be we have come to a new crossroad of the development process that will take over strategic management? (...

Limiting Entropy of Determinantal Processes

We extend Lyons's tree entropy theorem to general determinantal measures. As a byproduct we show that the sofic entropy of an invariant determinantal measure does not depend on the chosen sofic approximation

The Distribution of Sandpile Groups of Random Regular Graphs

We study the distribution of the sandpile group of random d-regular graphs. For the directed model, we prove that it follows the Cohen-Lenstra heuristics, that is, the limiting probability that the p-Sylow subgroup of the sandpile group is a given p-group P, is proportional to | Aut(P)|−1. For finitely many primes, these events get independent in the limit. Similar results hold for undirected random regular graphs, where for odd primes the limiting distributions are the ones given by Clancy, Leake and Payne. This answers an open question of Frieze and Vu whether the adjacency matrix of a random regular graph is invertible with high probability. Note that for directed graphs this was recently proved by Huang. It also gives an alternate proof of a theorem of Backhausz and Szegedy. This answers an open question of Frieze and Vu whether the adjacency matrix of a random regular graph is invertible with high probability. Note that for directed graphs this was recently proved by Huang. It also gives an alternate proof of a theorem of Backhausz and Szegedy

Accurate Telescope Mount Positioning with MEMS Accelerometers

This paper describes the advantages and challenges of applying microelectromechanical accelerometer systems (MEMS accelerometers) in order to attain precise, accurate and stateless positioning of telescope mounts. This provides a completely independent method from other forms of electronic, optical, mechanical or magnetic feedback or real-time astrometry. Our goal is to reach the sub-arcminute range which is well smaller than the field-of-view of conventional imaging telescope systems. Here we present how this sub-arcminute accuracy can be achieved with very cheap MEMS sensors and we also detail how our procedures can be extended in order to attain even finer measurements. In addition, our paper discusses how can a complete system design be implemented in order to be a part of a telescope control system.Comment: Accepted for publication in PASP, 12 page

Mintázatképződés, önszerveződés csapadékrendszerekben és a mintázatok tervezése és vezérlése mikro- és nanoskálán = Pattern formation and self-organization in precipitation systems, design and control of patterns in the micro and nanoscales

A projektben a csapadékmintázatok képződését vizsgáltuk. Mintázatképződés változatos térbeli skálán mehet végbe és a mintázatképződés dinamikájának megértésre nagyon fontos, mert ezekkel az ismeretekkel különleges és különféle tulajdonságú anyagot lehet tervezni az anyagtudományokban. Több technikát fejlesztettünk ki a csapadékmintázatok tervezésére és vezérlésére reakció-diffúzió rendszerekben. A kifejlesztett módszerek a következők: (i) a mintázat vezérlése előre programozott elektromos árammal; (ii) a mintázat kontrollja oldhatósági szorzat változtatásával; (iii) a mintázat kontrollja a gél struktúrájának változtatásával; (iv) a mintázat kontrollja mozgó kémiai frontban; a mintázatok vezérlése pH mező segítségével. Ezenfelül, egy új párhuzamosítási platformot fejlesztettünk ki videokártyák használatával CUDA környezetben. Ez az új technika hasznos lehet számos tudományos probléma numerikus megoldásának gyorsításában. | During this project important aspects of the pattern formation in precipitation systems were investigated. Spontaneous pattern formation can be observed at all length scales and much effort has been devoted to gaining insight into the dynamics of theses processes because of design of special materials. We proposed and developed several techniques to control precipitation patterns in reaction-diffusion systems. The developed methods are following: (i) pattern control using predesigned electric currents; (ii) pattern control varying the precipitation threshold (solubility product); (iii) pattern control varying the gel structure; (iv) pattern control in a moving reaction front; (v) pattern control by pH field. Moreover, a new parallel computational framework has also been developed using video card with CUDA for simulation reaction-diffusion processes. This new approach can be useful to accelerate numerical simulations of the scientific problems