Constructing a Scheduling Algorithm For Multidirectional Elevators Constructing a Scheduling Algorithm For Multidirectional Elevators

Abstract With this thesis we aim to create an efficient scheduling algorithm for elevators that can move in multiple directions and establish if and when the algorithm is efficient in comparison to algorithms constructed for traditional elevator algorithms. To measure efficiency, a simulator is constructed to simulate an elevator system implementing different algorithms. Because of the challenge of constructing a simulator and since we did not find either a simulator nor any algorithms for use in multidirectional elevator systems publicly, we decided to focus on these subjects. The results in this thesis leads us to the conclusion that a multidirectional elevator algorithm is efficient to use under certain circumstances. If the traffic is concentrated to one floor in the building the multidirectional elevator system performs poorly but when the traffic is spread out it outperforms traditional elevators algorithms. We hope that this research will inspire to further research in the area of multidirectional elevator systems. Referat Med denna rapport strävar vi efter att skapa en effektiv schemaläggningsalgoritm för hissar som kan åka i flera riktningar och fastslå om och när det är effektiv att använda en sådan, i jämförelse med algoritmer konstruerade för traditionella hissar som endast rör sig i två riktningar. För att mäta effektivitet konstrueras en simulator för att simulera ett hissystem som använder sig av olika algoritmer. På grund av utmaningen av att skapa en simulator och eftersom vi inte kunde finna varken en simulator eller någon publik algoritm som kan användas i ett flerriktat hissystem bestämde vi oss för att fokusera på dessa ämnen. Resultaten i denna rapport leder till slutsatsen att en hiss som kan åka i flera riktningar är effektiv under vissa förhållanden. Om trafiken till hissen är koncentrerad till en våning i byggnaden kommer algoritmen prestera mindre bra men om trafiken är utspridd presterar den bättre än traditionella hissalgoritmer. Vi hoppas att denna undersökning kommer inspirera fortsatt forskning inom området med flerriktade hissystem

A benchmark of algorithms for the Professor's Cube A benchmark of algorithms for the Professor's Cube

Abstract Rubik's Cube is a well known puzzle that has entertained for decades. This thesis studies two relatively new phenomenons; the 5 3 cube, also known as the Professor's Cube , and the practice of speedcubing. This report presents two existing algorithms developed by speedcubers that enable human executors to quickly solve the puzzle. The algorithms are implemented and their results compared in order to show which one requires fewer steps to solve the puzzle. The conclusion is that it is faster to use the original Davenport algorithm instead of the newer version by Monroe if the number of twists is your limiting factor

On the beat : human movement and timing in the production and perception of music /

Diss. doct.Leman, Mar

Digital computer applications to process control /

Proceedings of the first international conference held September 21-23, 1964, in Stockholm, Swede

Free Open Source Communities Sustainability: Does It Make a Difference in Software Quality?

Context: Free and Open Source Software (FOSS) communities' ability to stay viable and productive over time is pivotal for society as they maintain the building blocks that digital infrastructure, products, and services depend on. Sustainability may, however, be characterized from multiple aspects, and less is known how these aspects interplay and impact community outputs, and software quality specifically. Objective: This study, therefore, aims to empirically explore how the different aspects of FOSS sustainability impact software quality. Method: 16 sustainability metrics across four categories were sampled and applied to a set of 217 OSS projects sourced from the Apache Software Foundation Incubator program. The impact of a decline in the sustainability metrics was analyzed against eight software quality metrics using Bayesian data analysis, which incorporates probability distributions to represent the regression coefficients and intercepts. Results: Findings suggest that selected sustainability metrics do not significantly affect defect density or code coverage. However, a positive impact of community age was observed on specific code quality metrics, such as risk complexity, number of very large files, and code duplication percentage. Interestingly, findings show that even when communities are experiencing sustainability, certain code quality metrics are negatively impacted. Conclusion: Findings imply that code quality practices are not consistently linked to sustainability, and defect management and prevention may be prioritized over the former. Results suggest that growth, resulting in a more complex and large codebase, combined with a probable lack of understanding of code quality standards, may explain the degradation in certain aspects of code quality

Organizational effects of the use of information and communication technology (ICT) in elderly homecare : a case study

The use of information and communication technology (ICT) to support integrated healthcare services in elderly homecare is becoming more established. In particular, ICT can enable information exchange, knowledge sharing and documentation at the point-of-care (POC). The aim of this study was to explore these effects using the Old@Home prototype. Old@Home was perceived to contribute in developing horizontal links for communication between individuals who work together, independent of geographical distance or organizational affiliation, and to contribute to increased work efficiency. The prototype was further seen to reduce professional isolation by providing a holistic overview of the care process. User centred design and implementation of Old@Home was considered key to facilitating acceptance of organizational changes. Participation of care professionals not only led to a better understanding of the needs of involved organizations, but also increased end-users' involvement and commitment, stimulating them to test and improve the prototype until the final version.</p

Sorting in linear time?

SIGLEAvailable from TIB Hannover: RR 1912(95-1-024) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Two papers on random dynamical systems over #rho#-adic numbers: Attractors of random dynamical systems over #rho#-adic numbers and a model of 'noisy'thinking. The interference phenomenon, memory effects in the equipment and random dynamical systems over the fields of #rho#-adic numbers

SIGLEAvailable from TIB Hannover: RA 6154(427)+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman