2,219,892 research outputs found
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Unravelling the dynamics of learning design within and between disciplines in higher education using learning analytics
Designing effective learning experience in virtual learning environment (VLE) can be supported by learning analytics (LA) through explicit feedback on how learning design (LD) influences studentsâ engagement, satisfaction and performance. Marrying LA with LD not only puts existing pedagogical theories in instructional design to the test with actual learning data, but also provides the context of learning which helps educators translate established LA findings to direct interventions. My dissertation aims at unpacking the complexity of LD and its impact on studentsâ engagement, satisfaction and performance on VLE using LA. The context of this study is 400+ online and blended learning modules at the Open University (OU) UK. This research combines multiple sources of data from the OU Learning Design Initiative (OULDI), system log data, self-reported surveys, and performance data. Given the scope of this study, a wide range of visualization techniques, social network analysis, multi-level modelling, and machine learning will be used
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Ship design with the human factor: evacuation and normal operations modelling in the ship design process
This thesis addresses the modelling of human factors and how they can impact ship design. Two different but related applications areas are considered; passenger ship evacuation analysis and naval vessel normal operations and evacuation analysis.
In the first instance, this thesis investigates the impact of the current regulatory specified passenger response time distributions upon evacuation analysis and then recommends a more realistic passenger response time distribution which should be implemented when performing an evacuation analysis of a passenger RO-RO vessel. This realistic passenger response time distribution is based upon the results of sea trials. The results of this analysis have been adopted by the IMO and form part of the new guideline document, IMO MSC 1238.
In addition, this thesis addresses the analysis of the human factorsâ performance of a naval vessel. Naval vessels are built primarily for undertaking assigned missions in times of war and conflict. While the safety of those on board is important, the ability of the vessel to function and complete its assigned mission is of paramount importance. This thesis utilises an evacuation model, maritimeEXODUS, which was extended to incorporate the functionality of modelling non-evacuation scenarios, to assess the human factorsâ performance of a naval vessel during both normal operations and evacuation scenarios.
This thesis develops a methodology for simultaneously assessing the human factorsâ performance of both a range of normal operation scenarios and evacuation scenario on board a naval vessel. The methodology, called the Human Performance Metric (HPM), is discriminating, diagnostic, systematic, transparent and reproducible in nature.
This thesis then implements the HPM methodology into the early stages of the design cycle for a new naval vessel. The thesis presents the software modifications required to implement the methodology in to the design cycle as well as presenting a demonstration of the new system
Spatial Performance Analysis and Design Principles for Wireless Peer Discovery
In wireless peer-to-peer networks that serve various proximity-based
applications, peer discovery is the key to identifying other peers with which a
peer can communicate and an understanding of its performance is fundamental to
the design of an efficient discovery operation. This paper analyzes the
performance of wireless peer discovery through comprehensively considering the
wireless channel, spatial distribution of peers, and discovery operation
parameters. The average numbers of successfully discovered peers are expressed
in closed forms for two widely used channel models, i.e., the interference
limited Nakagami-m fading model and the Rayleigh fading model with nonzero
noise, when peers are spatially distributed according to a homogeneous Poisson
point process. These insightful expressions lead to the design principles for
the key operation parameters including the transmission probability, required
amount of wireless resources, level of modulation and coding scheme (MCS), and
transmit power. Furthermore, the impact of shadowing on the spatial performance
and suggested design principles is evaluated using mathematical analysis and
simulations.Comment: 12 pages (double columns), 10 figures, 1 table, to appear in the IEEE
Transactions on Wireless Communication
Evaluating Pro-poor Transfers When Targeting is Weak: The Albanian Ndihma Ekonomike Program Revisited
The Albanian Ndihma Ekonomike is one of the first poverty reduction programs launched in transitional economies. Its record has been judged positively during the recession period of the 1990s and negatively during the more recent growth phase. This paper reconsiders the program using a regression-adjusted matching estimator rst suggested by Heckman et al. (1997, 1998) and exploiting discontinuities in program design and targeting failures. We nd the program to have a weak targeting capacity and a negative and signicant impact on welfare. We also nd that recent changes introduced to the program have not improved its performance. An analysis of the distributional impact of treatment based on stochastic dominance theory suggests that our results are robust.Social assistance, Poverty, Impact Evaluation, Albania
IT integration, operations flexibility and performance: an empirical study
Purpose: This study examines the relationship between IT implementation and performance
with manufacturing flexibility based on a sample drawn from a set of manufacturing firms.
Design/methodology/approach: The relationships were analyzed using structural equations
modelling (SEM) using EQS 6.2 software. Previously, an explanatory factor analysis confirmed
one-dimensionality of the scales, Cronbachâs alpha was calculated to evaluate its internal
consistency and a confirmatory factor analysis was run to observe scalesâ validity.
Findings: This research proves a significant positive and direct effect of IT implementation on
operations performance with 4 out of 6 flexibility dimensions (Machine, Labour, Material
handling and Volume). Mix and Routing flexibility dimensions show no significant impact on
firm performance.
Research limitations/implications: It is necessary to be cautious when generalizing this
findings these findings, as service firms were not part of the sample even when statistical results
prove robustness suggesting that the findings are quite reliable. Some flexibility dimensions show
no significant impact in performance (Routing and Mix flexibility). This is consistent with the fact
that these flexibility dimensions act as variability absorbers within the manufacturing process.
Future research lines: Future studies can focus on determining further internal and
environmental factors that affect operations flexibility according to specific sector characteristics.
Originality/value: This research proves a significant positive and direct effect of IT
implementation on operations performance. Results show not only the links between IT
implementation and operations performance, but also the magnitude of every impact. The model
considers IT integration as the degree of alignment that existing technology resources in a firm
have with the business strategy, in terms of importance and support for this strategyPeer Reviewe
A Qualitative Method for Assessing the Impact of ICT on the Architectural Design Process
During the last thirty years or so, we have witnessed tremendous developments in information and communication technology (ICT). Computer processing power doubles each 18 months, as Gordon Moore predicted during the mid-1960s. The computer and communications world has been revolutionised by the invention of the Internet. It has changed the way of exchanging, viewing, sharing, manipulating and storing the information. Other technologies such as smartphones, wearable computers, tablets, wireless communications and satellite communications have made the adoption of ICT easier and beneficial to all its users. ICT affects the productivity, performance and the competitive advantage of a business. It also impacts on the shape of the business process and its product. In architectural design, ICT is widely used throughout the design process and its final product. The aim of this research, therefore, is to explore the key implication of using ICT in architectural design and what new changes and forms have occurred on buildings as a result of ICT developments and use by architecture practitioners. To achieve this aim, a qualitative research approach was adopted using a narrative review of ICT usage in the design of buildings. The literature found was subjected to a thematic analysis of how ICT adoption affected the architectural design process. The findings of this research indicate that there is a continuous change in the design process and its final products (buildings) as the technology evolves. The framework proposed provides a foundation for gathering evidence from case studies of the impact of ICT adoption by architectural designers. The research proposes that future empirical work has to be conducted to test and refine the relevance, importance and applicability of each of the components of the framework, in order to detect the impact of ICT on the building design process and its final product
New product development in an emerging economy: analysing the role of supplier involvement practices by using Bayesian Markov chain Monte Carlo technique
The research question is whether the positive relationship found between supplier involvement practices and new product development performances in developed economies also holds in emerging economies. The role of supplier involvement practices in new product development performance is yet to be substantially investigated in the emerging economies (other than China). This premise was examined by distributing a survey instrument (Jayaramâs (2008) published survey instrument that has been utilised in developed economies) to Malaysian manufacturing companies. To gauge the relationship between the supplier involvement practices and new product development (NPD) project performance of 146 companies, structural equation modelling was adopted. Our findings prove that supplier involvement practices have a significant positive impact on NPD project performance in an emerging economy with respect to quality objectives, design objectives, cost objectives, and âtime-to-marketâ objectives. Further analysis using the Bayesian Markov Chain Monte Carlo algorithm, yielding a more credible and feasible differentiation, confirmed these results (even in the case of an emerging economy) and indicated that these practices have a 28% impact on variance of NPD project performance. This considerable effect implies that supplier involvement is a must have, although further research is needed to identify the contingencies for its practices
A methodological comparison between energy and environmental performance evaluation
The European Union is working on strategies in order to increase the energy efficiency of buildings. A useful solution is to identify the energy performance of buildings through the Energy Performance Certificate (EPC), as it provides information for the comparison of buildings with different architectural typology, shape, design technology and geographic location. However, this tool does not assess the real energy consumption of the building and does not always take into account its impact on the environment. In this work, two different types of analysis were carried out: one based only on the energy efficiency and the other one based on the environmental impact. Those analyses were applied on a standard building, set in three different Italian locations, with the purpose of obtaining cross-related information. After the evaluation of the results, interventions on some parameters (walls insulation, windows frame, filler gas in the insulated glazing) have been identified in order to improve the energy behavior of the building with an acceptable environmental impact. The aim of this paper is to propose a methodology that integrates the EPC with green building rating systems, leading to a more conscious choice of retrofit interventions as a compromise between energy performances and environmental impact
The determinants of the quality of Sales-Marketing Interface in a Multinational Customer Brand Focused Company: The Latin American Branches
Customer evolution and changes in consumers, determine the fact that the quality of the interface between marketing and sales may represent a true competitive advantage for the firm. Building on multidimensional theoretical and empirical models developed in Europe and on social network analysis, the organizational interface between the marketing and sales departments of a multinational high-growth company with operations in Argentina, Uruguay and Paraguay is studied. Both, attitudinal and social network measures of information exchange are used to make operational the nature and quality of the interface and its impact on performance. Results show the existence of a positive relationship of formalization, joint planning, teamwork, trust and information transfer on interface quality, as well as a positive relationship between interface quality and business performance. We conclude that efficient design and organizational management of the exchange network are essential for the successful performance of consumer goods companies that seek to develop distinctive capabilities to adapt to markets that experience vertiginous change
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