THEORETICAL INVESTIGATION INTO SYSTEMS ANALYSIS

Systems analysis has been practiced by expert systems analysts or IT people in the third person perspective or objective one. We question this style of systems analysis and investigate into what it should be and who should practice it in an unpredictable, turbulent environment. The existing systems analysis methods such as UML help systems analysts ignore the differences of individual workers and pay attention solely to roles or functions played by them. However current companies depend more on individual knowledge workers and their experiences. Recently there have appeared a few methods with which business professionals or workers themselves reflect on their own knowledge and experiences, one of them proposing systems analysis in the first person perspective. The development of those methods is primarily based on the practical experiences and needs as consultants. Therefore there is still no theoretical background and support to the development. We made a theoretical investigation into this alternative discourse of systems analysis. Our study consists of an exploration into Stacey’s theory on organizations as a cue for systems analysis in a turbulent environment and two explorations into organization development literature for high performance in a less turbulent environment and the meanings of systems analysis

Magnetic gear dynamics for servo control

This paper considers the analysis and application of magnetic gearbox and magnetic coupling technologies and issues surrounding their use for motion control servo systems. Analysis of a prototype magnetic gear is used as a basis for demonstrating the underlying nonlinear torque transfer characteristic, nonlinear damping, and `pole-slipping' when subject to over-torque (overload) conditions. It is also shown how `pole-slipping' results in consequential loss of control. A theoretical investigation into the suppression of mechanical torsional resonances in transmission systems encompassing these highly-compliant magnetically-coupled components is included, along with experimental results, from a demonstrator drive-train. The automatic detection of pole-slipping, and recovery scenarios, is also presented

Robust control in the quantum domain

Recent progress in quantum physics has made it possible to perform experiments in which individual quantum systems are monitored and manipulated in real time. The advent of such new technical capabilities provides strong motivation for the development of theoretical and experimental methodologies for quantum feedback control. The availability of such methods would enable radically new approaches to experimental physics in the quantum realm. Likewise, the investigation of quantum feedback control will introduce crucial new considerations to control theory, such as the uniquely quantum phenomena of entanglement and measurement back-action. The extension of established analysis techniques from control theory into the quantum domain may also provide new insight into the dynamics of complex quantum systems. We anticipate that the successful formulation of an input-output approach to the analysis and reduction of large quantum systems could have very general applications in non-equilibrium quantum statistical mechanics and in the nascent field of quantum information theory.Comment: 12 pages, 1 figur

Structural Characteristics of Aligned Fibre-Matrix Space Structures.

An investigation was undertaken into the structural behaviour of skeletal systems, manufactured from pultruded fibre reinforced polyester (f. r. p. ), also into the structural characteristics of pultruded f. r. p. and into the reliability of the material and structural systems. The study applied theoretical and experimental methods to single member elements and to the main classes of skeletal space structures. The testing of single members was undertaken to determine the properties of the material and to assess its degree of variability. A computer program was developed for the non-linear analysis of skeletal structures manufactured from pultruded f. r. p. members. The program was used for the analysis of full scale models, and in addition, was used to undertake a theoretical parameter investigation to study the methods of improving the performance of these skeletal systems. The experimental testing of the various models was carried out to study the structural performance up to failure, in both the pre and post-buckling states, to assess the validity of the non-linear analysis program developed for this research, and also to compare the linear and non-linear methods of analysis of the various systems. The need for the non-linear method of analysis for the f. r. p. skeletal structures, especially for the flexible type is shown when the experimental behaviour of a skeletal dome is compared with the theoretical computer linear and non-linear analyses. The cases in which the linear method of analysis can be utilized and its limitation for the skeletal f. r. p. structures are clearly pointed out. Various aspects of the behaviour of the f. r. p. members and structural assemblies such as the deformability, recovery and mode of failure are obtained. The importance of the combination of more than one type of f. r. p. members on the structural efficiency is shown

Accountability and corruption : political institutions matter

Using a cross-country panel, Lederman, Loayza, and Soares examine the determinants of corruption, paying particular attention to political institutions that increase political accountability. Previous empirical studies have not analyzed the role of political institutions, even though both the political science and the theoretical economics literature have indicated their importance in determining corruption. The main theoretical hypothesis guiding the authors?empirical investigation is that political institutions affect corruption through two channels: political accountability and the structure of the provision of public goods. The results suggest that political institutions are extremely important in determining the prevalence of corruption: democracy, parliamentary systems, political stability, and freedom of the press are all associated with lower corruption. In addition, the authors show that common findings of the earlier empirical literature on the determinants of corruption?elated to openness and legal tradition?o not hold once political variables are taken into account.Corruption&Anitcorruption Law,Decentralization,Pharmaceuticals&Pharmacoeconomics,Public Sector Corruption&Anticorruption Measures,Poverty Monitoring&Analysis,National Governance,Governance Indicators,Pharmaceuticals&Pharmacoeconomics,Corruption&Anitcorruption Law,Public Sector Corruption&Anticorruption Measures

Computational Modeling, Formal Analysis, and Tools for Systems Biology.

As the amount of biological data in the public domain grows, so does the range of modeling and analysis techniques employed in systems biology. In recent years, a number of theoretical computer science developments have enabled modeling methodology to keep pace. The growing interest in systems biology in executable models and their analysis has necessitated the borrowing of terms and methods from computer science, such as formal analysis, model checking, static analysis, and runtime verification. Here, we discuss the most important and exciting computational methods and tools currently available to systems biologists. We believe that a deeper understanding of the concepts and theory highlighted in this review will produce better software practice, improved investigation of complex biological processes, and even new ideas and better feedback into computer science

Knowledge Management: Results from an Exploratory Case Study

This paper presents the results of an exploratory case study into knowledge management within an organisation. Using a theoretical framework as a guide to research and analysis, the case study looked the knowledge processes of generation, codification and utilisation, and the effects that different corporate sub-systems have on the knowledge processes, as well as KM efforts as a whole. The results have led to the identification of areas requiring extra investigation that will be explored in future research

An investigation into natural vibrations of fluid-structure interaction systems subject to Sommerfeld’s radiation condition

A fluid-structure interaction system subject to Sommerfeld’s condition is defined as a Sommerfeld system which is divided into three categories: Fluid Sommerfeld (FS) System, Solid Sommerfeld (SS) System and Fluid Solid Sommerfeld (FSS) System of which Sommerfeld conditions are imposed on a fluid boundary only, a solid boundary only and both fluid and solid boundaries, respectively. This paper follows the previous initial results claimed by simple examples to further mathematically investigate the natural vibrations of generalized Sommerfeld systems. A new parameter representing the speed of radiation wave for generalized 3-D problems with more complicated boundary conditions is introduced into the Sommerfeld condition which allows investigation of the natural vibrations of a Sommerfeld system involving both free surface and compressible waves. The mathematical demonstrations and selected examples confirm and reveal the natural behaviour of generalized Sommerfeld systems defined above. These generalized conclusions can be used in theoretical or engineering analysis of the vibrations of various Sommerfeld systems in engineering