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Now showing items 21-40 of 31595
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Message passing in an object-oriented database management system
(Bilkent University, 1988)In this thesis, a focused survey on object-oriented database management systems and on object-orientation in general was carried out and a single- user object-oriented database management system prototype was designed and ... -
An Object memory for an object-oriented database management system
(Bilkent University, 1988)Object-oriented paradigm is an approach that can be applied in various areas of computing. In this approach, each entity is represented by an object which captures the state and the behaviour of the entity. In this thesis, ... -
Congestion control in interconnected computer networks
(Bilkent University, 1988)A computer network has a collection of resources shared by multiple users. The capacity of the resources is limited, and if the user demands exceed the capacity, the network becomes ’congested’. The congestion causes a ... -
Stabilization of multivariable systems with constrained control structure
(Bilkent University, 1988)The following problem is considered: Given a multivariable system with m inputs and r outputs and an m x r matrix whose nonnegative (i,j)’th element represents the cost of setting up a feedback link from the j ’th output ... -
A heuristic procedure for a single-item dynamic lot sizing problem
(1988)An O(T) heuristic proceudre for a single-item dynamic lot sizing problem is introduced in this paper. The algorithm tries to establish the regeneration points of the problem whether either the production or the beginning ... -
Effect of tip profile on atomic-force microscope images: A model study
(1988)Adopting the empirical silicon interatomic potential of Stillinger and Weber, we investigate the effect of the tip profile on the atomic-force microscope images for a prototype system, Si(001)-(2×1), and conclude that the ... -
Design and analysis of just-in-time production systems
(Bilkent University, 1988)Just-in-Time (JIT) production systems have initially appeared in the Japanese manufacturing environment due to the scarcity of their critical resources. The main aim in JIT production systems is to eliminate waste. ... -
Atomic theory of the scanning tunneling microscope
(Bilkent University, 1988)The Scanning Tunneling Microscope is proven to be one of the most powerful tools for surface structure determination. Present theories are able to explain the operation of the microscope when the tip is far from the ... -
Electronic structure of Si/Ge semiconductor superlattices
(Bilkent University, 1988)A brief review about the two dimensional electron systems and especially band offsets is given. The electronic properties of the Si„/Ge„(001) strained superlattices as a function of the superlattice periodicity and the ... -
Organizational structure and change: A Case study of the warehouse and stock control system in Tepe Co
(Bilkent University, 1988)A sophisticated information processing system can cause a change in the organizational structure. In this work, the Warehouse and Stock Control System in TEPE CO. is chosen as a case study to examine a planned organizational ... -
A sequential dual simplex algorithm for the linear assignment problem
(1988)We present a sequential dual-simplex algorithm for the linear problem which has the same complexity as the algorithms of Balinski [3,4] and Goldfarb [8]: O(n2) pivots, O(n2 log n + nm) time. Our algorithm works with the ... -
Continuous processing of images through user sketched functional blocks
(1988)Our aim is to implement an image processing system with previously defined algorithms through the use of functional blocks connected together to form a diagram that we call a schematic. A functional block means the ... -
Critical relaxation of the two-dimensional three-state Potts model with conserved dynamics
(1988)The dynamical critical exponent z is obtained using the finite-size scaling method for the two-dimensional three-state Potts model with conserved dynamics. It is observed that there is a change in the dynamical behaviour ... -
Sequential Decoding for Multiple Access Channels
(1988)The use of sequential decoding in multiple access channels is considered. The Fano metric, which achieves all achievable rates in the one-user case, fails to do so in the multiuser case. A new metric is introduced and an ... -
Surface metallization of silicon by potassium adsorption on Si(001)-(2×1)
(1988)We present the detailed results of self-consistent and geometry-optimized total-energy, band-structure, and charge-density calculations for a potassium-covered Si(001)-(2×1) surface, and for an unsupported potassium ... -
Sorption of Cesium and Strontium on Montmorillonite and Kaolinite
(1988)Sorption characteristics of Cs+ and Sr++on montmorillonite and kaolinite type clays and soil fractions from various regions of Turkey were studied using the batch method. 137Cs and 90Sr were used as tracers. Concentrations ... -
A transportation type aggregate production model with bounds on inventory and backordering
(1988)We consider a certain T period aggregate production planning model, where the two sources of production are regular and overtime. The model allows for time varying production, holding and backordering costs and includes ... -
Efficiency calibration and summation effects in gamma-ray spectrometry
(Kluwer Academic Publishers, 1988)Precise, absolute γ-ray efficiences (∈γ) and total efficiences (∈T), have been measured at various distances from the detector, using a set of standards. The observed linear variation of ∈γ and ∈T as well as ∈γ/∈T with Eγ ... -
A Parallel Prolog emulator
(Bilkent University, 1988)There are various parallel Prolog execution models proposed so far. In this study, an emulator has been developed to test the execution model PPEM. The emulator is used to collect data to evaluate the performance of the ... -
Electronic structure of strained Sin/Gen(001) superlattices
(1988)Using the empirical tight binding method we have investigated the electronic properties of the Sin/Gen(001) strained superlattices as a function of the superlattice periodicity and the band misfit. For n ≥ 4 we have found ...
