Zhao Fei. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2003. / Includes bibliographical references (leaves 87-89). / Abstracts in English and Chinese. / Chapter 1. --- Introduction --- p.1 / Chapter 1.1 --- Multirate Scheme --- p.2 / Chapter 1.1.1 --- VSF Scheme --- p.3 / Chapter 1.1.2 --- Multicode Scheme --- p.5 / Chapter 1.2 --- Multicode CDMA System --- p.7 / Chapter 1.2.1 --- System Model --- p.7 / Chapter 1.2.2 --- Envelope Variation of Multicode Signal --- p.9 / Chapter 1.2.3 --- Drawback of Multicode Scheme --- p.11 / Chapter 1.3 --- Organization of the Thesis --- p.13 / Chapter 2. --- Related Work on Minimization of PAP of Multicode CDMA --- p.15 / Chapter 2.1 --- Constant Amplitude Coding --- p.16 / Chapter 2.2 --- Multidimensional Multicode Scheme --- p.22 / Chapter 2.3 --- Precoding for Multicode Scheme --- p.25 / Chapter 2.4 --- Summary --- p.26 / Chapter 3. --- Multicode CDMA System with Constant Amplitude Transmission --- p.27 / Chapter 3.1 --- System Model --- p.28 / Chapter 3.2 --- Selection of Hadamard Code Sequences --- p.31 / Chapter 3.3 --- The Optimal Receiver for the Multicode System --- p.37 / Chapter 3.3.1 --- The Maximum-Likelihood Sequence Detector --- p.38 / Chapter 3.3.2 --- Maximum A Posteriori Probability Detector --- p.41 / Chapter 4. --- Multicode CDMA System Combined with Error-Correcting Codes --- p.45 / Chapter 4.1 --- Hamming Codes --- p.46 / Chapter 4.2 --- Gallager's Codes --- p.48 / Chapter 4.2.1 --- Encoding of Gallager's Codes --- p.48 / Chapter 4.2.2 --- Multicode Scheme combined with Gallager's Code --- p.52 / Chapter 4.2.3 --- Iterative Decoding of the Multicode Scheme --- p.55 / Chapter 4.3 --- Zigzag Codes --- p.59 / Chapter 4.4 --- Simulation Results and Discussion --- p.62 / Chapter 5. --- Multicode CDMA System with Bounded PAP Transmission --- p.68 / Chapter 5.1 --- Quantized Multicode Scheme --- p.69 / Chapter 5.1.1 --- System Model --- p.69 / Chapter 5.1.2 --- Interference of Code Channels --- p.71 / Chapter 5.2 --- Parallel Multicode Scheme --- p.74 / Chapter 5.2.1 --- System Model --- p.74 / Chapter 5.2.2 --- Selection of Hadamard Code Sequences --- p.75 / Chapter 6. --- Conclusions and Future Work --- p.82 / Chapter 6.1 --- Conclusions --- p.82 / Chapter 6.2 --- Future Work --- p.84 / Bibliography --- p.87

Företag hittar ständigt nya sätt att arbeta genom olika strategier. En ny sådan strategi kallas extrem tjänstefiering som innebär att företag går från att sälja fysiska produkter, till att sälja funktionen av en produkt. Istället för att exempelvis sälja en borrmaskin, säljer man antal borrhål som maskinen producerar. Denna nya strategi har växt till ett nytt fenomen som företag börjat implementera i sina affärsmodeller. Detta fenomen har till stor del studerats inom området för innovation och miljö, men redovisningsaspekten av strategin saknas helt. I och med att det är ett relativt nytt sätt att arbeta har inga studier gjorts inom ämnet för redovisning, samt finns det inget specifikt regelverk som behandlar detta fenomen. Studiens syfte formulerades därför till att beskriva revisorers tolkningar av avtal som innefattar extrem tjänstefiering samt analysera problematiken som uppstår med detta och se hur normgivare förhåller sig till den problematiken. För att kunna besvara studiens syfte valdes följande frågeställningar; 1) Hur anser revisorer i Sverige att noterade företag bör redovisa avtal som innefattar extrem tjänstefiering? 2) Vilken redovisningsproblematik anser revisorerna uppstå med denna typ av avtal? Och 3) Hur förhåller sig normgivare till den identifierade redovisningsproblematiken för denna typ avtal? Genom en kvalitativ metodansats består empirin av totalt en intervju med ett företag som arbetar med extrem tjänstefiering, sex revisorer samt två normgivare inom redovisning i Sverige. Studiens resultat visar på att extrem tjänstefiering bör redovisas genom att kostnadsföra avgiften löpande. Den största problematiken som framkommer i studien är jämförbarheten av de finansiella rapporterna. Extrem tjänstefiering verkar redovisas på ett helt annat sätt än andra liknande affärsstrategier. Det efterfrågas en tydlighet kring hur denna problematik ska lösas, men studiens resultat visar på att huruvida ansvaret för den tydligheten bör ligga hos normgivarna eller revisorerna är de båda parterna oense om. Revisorerna efterfrågar förändring från normgivarnas sida, medan normgivarna anser att de befintliga regelverken är tillräckliga och att det är upp till de redovisningsansvariga att vara tydliga i sin redovisning och upp till revisorerna att vara tydliga i sin bedömning. / Companies are constantly trying to improve their business models by implementing new strategies. A new strategy that recently has become popular is called product service systems (PSS). This phenomenon is when companies instead of traditionally selling and buying physical products, now is selling or buying the function of a product. For example; instead of selling a drilling machine, the company sell the produced holes per hour that the machine is capable of making. This phenomenon has been studied mostly within the area of innovation and sustainability, but no studies has yet been written with an accounting perspective. There is no existing standard that regulate this specific business strategy, hence there is a lack of knowledge of this subject in an accounting perspective. Therefore we compiled the following purpose of this study to be; describe auditors interpretations and the assessments of business contracts that are involving PSS and also analyze the problems that come with it. We also want to highlight the norm setter’s view of the identified problems. To be able to answer the given purpose we decided to compile the following research questions; 1) How should a PSS contract be reported in the financial reports according to auditors in Sweden? 2) What accounting problems, regarding PSS contracts, does the auditors raise? 3) How does Swedish norm setters in accounting view the identified problems? Through a qualitative method the empirical chapter consists of a total of one interview with a PSS company, six auditors and two norm setters. The results of the study show that PSS should be expensed in the financial reports. The most important problem appears in the comparability between companies financial reports. PSS is being treated differently from other similar business strategies in the financial reports. There seems to be a need for clarification surrounding PSS contracts. The results show that there is a contradiction on whether that clarification should come from the norm setters or the auditors. The auditors claims that the norm setters should create and publish distinct guidelines on the topic, aiming for all auditors to make an equal assessment. While on the other hand the norm setters rather think that the existing standards are enough and that it is the auditors or the accountant’s responsibility to be transparent in the financial reports. Through transparency the norm setters believe that comparability between companies can be achieved.

The Internet Engineering Task Force (IETF) has recently released routing standards that allow deployment of TCP/IP local area networks (LANs) onboard a moving vehicle and yet maintain permanent connectivity of the onboard LAN to the Internet via a vehicular mobile router. This recent development opens up new opportunities for providing efficient mobile computing for users on the move, especially for commuters traveling on public transports. Supporting real-time communications, e.g. IP Telephony, on-line video on demand, etc., over such onboard mobile networks is the main motivation of this thesis. Due to the volatility of the wireless bandwidth available to connect the moving LAN to the Internet at different locations of the trip, supporting on-line services that require bandwidth guarantees becomes a challenging task. The main problem investigated is how to provide bandwidth guarantee efficiently, effectively, and in a scalable manner in the context of moving onboard networks. To achieve the goal, a systematic approach is taken that involves (i) designing a signalling protocol that allows transparent bandwidth reservation for the aggregate demand of all onboard users in the vehicle, and (ii) proposing effective aggregation and bandwidth reservation policies that aim to maximize the chances of successful reservation and minimize the bandwidth and processing overhead in critical network elements. Mathematical models are derived to evaluate the performance of proposed solutions. These models are validated using discrete event simulation. One important conclusion reached is that onboard mobile communication provides significant aggregation and centralized management opportunities that must be exploited to provide a scalable solution to the bandwidth guarantee problem in mobile communications. The techniques proposed and analyzed in this thesis to exploit such aggregation opportunities constitute the original contribution to knowledge.

Productivity and efficiency are the tools used in managing performance. This study researches and implements best practices that lead to best performance. A customer quality defined standard has to be created by benchmarking the Information Technology Service Regions which may be used to help decision-makers or management make informed decisions about (1) the effectiveness of service systems, (2) managing the performance of Information Technology Service Regions. Waiting lines or queues are an everyday occurrence and may take the form of customers waiting in a restaurant to be serviced or telephone calls waiting to be answered. The model of waiting lines is used to help managers evaluate the effectiveness of service systems. It determines precisely the optimal number of employees that must work at the centralised service desk. A Data Envelopment Analysis (DEA) methodology is used as a benchmarking tool to locate a frontier which is then used to evaluate the efficiency of each of the organizational units responsible for observed output and input quantities. The inefficient units can learn from the best practice frontier situated along the frontier line. / Thesis (M.Sc. (Computer Science))--North-West University, Vaal Triangle Campus, 2009.

The industrialized timber housing process is capable nowadays to build multi-storeyhouses since fairly new changes in the Swedish regulations where made after theadmission of the European Union in 1994.The industrialized process moves parts of the construction process into a highlyeffective factory where 3D-volumes of the building are prefabricated beforetransportation to the building site for assemble.The assembly process is relatively effective compared to the completion of thebuilding service system and this is therefore the main focus in this thesis. This thesisattends problems with completion of the building service system, and thereforedemarcates from other aspects, such as technical and economic aspects, of thebuilding service system.The degree of completion of the flats differs from completion of the connectivepassages, for example hallways, in a way that suggests a need for further investigation.This thesis includes analysis of the possibilities to increase the prefabricatedconnective passages, to the extent of containing building service systems.An increase of the prefabrication of the building service system has a greatdevelopment potential, even though some restraining factors need to be solvedbefore implementation.This thesis was made in collaboration with two of Sweden’s leading companies on themarket of multi-storey industrialized timber housing, Moelven ByggModul AB andLindbäcks Bygg AB.

This dissertation presents innovative demand management techniques for service systems with limited resources. The first study analyzes demand management policies of animal shelters with limited Kennel space as a set of interacting stochastic queueing systems. In practice, there are two main policies being used, which we call "Kill" and "No-Kill" policies. In a "Kill" system, animals may be euthanized if a shelter is full. Many shelters have moved to a "No-Kill" policy, where they avoid killing for space and adopt other approaches to reduce supply and demand mismatch. Our goal is to provide insights on how No-Kill policies, such as coordination, adoption and neutering campaigns, help reduce the animals' killing rate so that the shelter management can choose the way to effectively solve their problems. In the second part, we consider a topic of demand management for the Sports and Entertainment (S&E) industry, called "Scaling the house", i.e., how to divide seats into zones for different prices to maximize revenue across the venue. From the data obtained from several performance venues in the U.S., we find ticket demand is impacted by locations of seats as well as by price. We characterize closed-form solutions for the optimal two-dimensional zoning decision (with row and column cuts) and the one-dimensional decision (with row cuts), and explore when each model should be applied. The third study considers pricing as a tool to manage demand for the S&E tickets. We develop dynamic pricing with demand learning models where demand is also affected by time left until the show dates. Since the show's popularity is usually uncertain to the seller, we propose a method to learn the overall popularity via Bayesian updates. We perform computational experiments to understand properties of the model solutions and identify when demand learning is most beneficial.

Productivity and efficiency are the tools used in managing performance. This study researches and implements best practices that lead to best performance. A customer quality defined standard has to be created by benchmarking the Information Technology Service Regions which may be used to help decision-makers or management make informed decisions about (1) the effectiveness of service systems, (2) managing the performance of Information Technology Service Regions. Waiting lines or queues are an everyday occurrence and may take the form of customers waiting in a restaurant to be serviced or telephone calls waiting to be answered. The model of waiting lines is used to help managers evaluate the effectiveness of service systems. It determines precisely the optimal number of employees that must work at the centralised service desk. A Data Envelopment Analysis (DEA) methodology is used as a benchmarking tool to locate a frontier which is then used to evaluate the efficiency of each of the organizational units responsible for observed output and input quantities. The inefficient units can learn from the best practice frontier situated along the frontier line. / Thesis (M.Sc. (Computer Science))--North-West University, Vaal Triangle Campus, 2009.

Productivity and efficiency are the tools used in managing performance. This study researches and implements best practices that lead to best performance. A customer quality defined standard has to be created by benchmarking the Information Technology Service Regions which may be used to help decision-makers or management make informed decisions about (1) the effectiveness of service systems, (2) managing the performance of Information Technology Service Regions. Waiting lines or queues are an everyday occurrence and may take the form of customers waiting in a restaurant to be serviced or telephone calls waiting to be answered. The model of waiting lines is used to help managers evaluate the effectiveness of service systems. It determines precisely the optimal number of employees that must work at the centralised service desk. A Data Envelopment Analysis (DEA) methodology is used as a benchmarking tool to locate a frontier which is then used to evaluate the efficiency of each of the organizational units responsible for observed output and input quantities. The inefficient units can learn from the best practice frontier situated along the frontier line. / Thesis (M.Sc. (Computer Science))--North-West University, Vaal Triangle Campus, 2009.

The Internet Engineering Task Force (IETF) has recently released routing standards that allow deployment of TCP/IP local area networks (LANs) onboard a moving vehicle and yet maintain permanent connectivity of the onboard LAN to the Internet via a vehicular mobile router. This recent development opens up new opportunities for providing efficient mobile computing for users on the move, especially for commuters traveling on public transports. Supporting real-time communications, e.g. IP Telephony, on-line video on demand, etc., over such onboard mobile networks is the main motivation of this thesis. Due to the volatility of the wireless bandwidth available to connect the moving LAN to the Internet at different locations of the trip, supporting on-line services that require bandwidth guarantees becomes a challenging task. The main problem investigated is how to provide bandwidth guarantee efficiently, effectively, and in a scalable manner in the context of moving onboard networks. To achieve the goal, a systematic approach is taken that involves (i) designing a signalling protocol that allows transparent bandwidth reservation for the aggregate demand of all onboard users in the vehicle, and (ii) proposing effective aggregation and bandwidth reservation policies that aim to maximize the chances of successful reservation and minimize the bandwidth and processing overhead in critical network elements. Mathematical models are derived to evaluate the performance of proposed solutions. These models are validated using discrete event simulation. One important conclusion reached is that onboard mobile communication provides significant aggregation and centralized management opportunities that must be exploited to provide a scalable solution to the bandwidth guarantee problem in mobile communications. The techniques proposed and analyzed in this thesis to exploit such aggregation opportunities constitute the original contribution to knowledge.

Top-down, centralised approaches to reform of mental health services implemented over the past 15 years in Australia have failed to achieve the widely shared aim of comprehensive, integrated systems of care. Investment to date has focused on the development and integration of specialist mental health services and primary medical care, and evaluation research suggests some progress. Substantial inadequacies remain however in the comprehensiveness and continuity of care received by people affected by mental health problems, particularly in relation to social and psychosocial interventions. Intersectoral collaboration that includes the diverse range of non-medical primary health and social care services is one of the most fundamental remaining challenges facing mental health system reform.