Interrogation of fibre Bragg grating sensors using an arrayed waveguide grating

We experimentally investigate the use of an arrayed waveguide grating (AWG) to interrogate fibre Bragg grating (FBG) sensors. A broadband light source is used to illuminate the FBG sensors. Reflected spectral information is directed to the AWG containing integral photodetectors providing 40 electrical outputs. Three methods are described to interrogate FBG sensors. The first technique makes use of the wavelength-dependent transmission profile of an AWG channel passband, giving a usable range of 500 με and a dynamic strain resolution of 96 nε Hz-1/2 at 13 Hz. The second approach utilizes wide gratings larger than the channel spacing of the AWG; by monitoring the intensity present in several neighbouring AWG channels an improved range of 1890 με was achieved. The third method improves the dynamic range by utilizing a heterodyne approach based on interferometric wavelength shift detection, providing an improved dynamic strain resolution of 17 nε Hz -1/2 at 30 Hz. © 2005 IOP Publishing Ltd.

Technology adoption in small and medium-sized logistics providers

Purpose - The main aim of the research is to shed light on the role of information and communication technology (ICT) in the logistics innovation process of small and medium-sized third party logistics providers (3PLs). Design/methodology/approach - A triangulated research strategy was designed using a combination of quantitative and qualitative methods. The former involved the use of a questionnaire survey of small and medium-sized Italian 3PLs with 153 usable responses received. The latter comprised a series of focus groups and the use of seven case studies. Findings - There is a relatively low level of ICT expenditure with few companies adopting formal technology investment strategies. The findings highlight the strategic importance of supply chain integration for 3PLs with companies that have embarked on an expansion of their service portfolios showing a higher level of both ICT usage and information integration. Lack of technology skills in the workforce is a major constraint on ICT adoption. Given the proliferation of logistics-related ICT tools and applications in recent years it has been difficult for small and medium-sized 3PLs to select appropriate applications. Research limitations/implications - The paper provides practical guidelines to researchers in the effective use of mixed-methods research based on the concept of methodological triangulation. In particular, it shows how questionnaire surveys, focus groups and case study analysis can be used in combination to provide insights into multi-faceted supply chain phenomena. It also identifies several potentially fruitful avenues for future research in this specific field. Practical implications - The paper's findings provide useful guidance for practitioners on the effective adoption of ICT as part of the logistics innovation process. The findings also provide support for ICT vendors in the design of ICT solutions that are aligned to the needs of small 3PLs. Originality/value - There is currently a paucity of research into the drivers and inhibitors of ICT in the innovation processes of small and medium-sized 3PLs. This paper fills this gap by exploring the issue using a range of complementary research approaches. Copyright © 2013 Emerald Group Publishing Limited. All rights reserved.

Tunable pure dispersion slope compensators realized with novel complex gratings

We present a novel tunable dispersion compensator that can provide pure slope compensation. In experiments, we achieve dispersion slope tuning range of +/-650ps/nm2with >0.9nm usable bandwidth.

Interferometric and fibre Bragg grating sensor interrogation using an arrayed waveguide grating

We investigate the use of an arrayed waveguide grating (AWG) to interrogate both fibre Bragg grating (FBG) and interferometric sensors. A broadband light source is used to illuminate both the FBG and interferometric sensors. Reflected spectral information is directed to an AWG with integral photodetectors providing 40 electrical outputs. To interrogate interferometric sensors we investigated the dual wavelength technique to measure the distance of a Fabry-Perot cavity, which produced a maximum unambiguous range of 1440μm with an active sensor. Three methods are described to interrogate FBG sensors. The first technique makes use of the reflected light intensity in an AWG channel passband from a narrow bandwidth grating, giving a usable range of 500με and a dynamic strain resolution of 96nε/√Hz at 30Hz. The second approach utilises wide gratings larger than the channel spacing of the AWG; by monitoring the intensity present in corresponding AWG channels an improved range of 1890με was achieved. The third method improves the dynamic range by utilising a heterodyne approach based on interferometric wavelength shift detection providing a dynamic strain resolution of 17nε/√Hz at 30Hz.

The Experience Software-based Design of Virtual Medical Intrascopy Systems for Simulation Study

The questions of software-based design of “virtual” technical systems are considered as facility of imitation experiment for educational purposes. These virtual systems are usable for analysis of medical intrascopy systems functioning. The virtual educational technical systems allow guarantee the goodness technical training of bioengineers.

The challenges of developing an online tool to measure the quality of the passenger experience in a PanEuropean context

METPEX is a 3 year, FP7 project which aims to develop a PanEuropean tool to measure the quality of the passenger's experience of multimodal transport. Initial work has led to the development of a comprehensive set of variables relating to different passenger groups, forms of transport and journey stages. This paper addresses the main challenges in transforming the variables into usable, accessible computer based tools allowing for the real time collection of information, across multiple journey stages in different EU countries. Non-computer based measurement instruments will be used to gather information from those who may not have or be familiar with mobile technology. Smartphone-based measurement instruments will also be used, hosted in two applications. The mobile applications need to be easy to use, configurable and adaptable according to the context of use. They should also be inherently interesting and rewarding for the participant, whilst allowing for the collection of high quality, valid and reliable data from all journey types and stages (from planning, through to entry into and egress from different transport modes, travel on public and personal vehicles and support of active forms of transport (e.g. cycling and walking). During all phases of the data collection and processing, the privacy of the participant is highly regarded and is ensured. © 2014 Springer International Publishing.

N–Dimensional Orthogonal Tile Sizing Problem

AMS subject classification: 68Q22, 90C90

Within-role, extra-role and anti-role behaviours in retail banking

Purpose: This paper aims to explore front line employee performance in retail banking and presents distinct components of employee performance, including extra-role and sabotage behaviours. Design/methodology/approach: Data was collected from Irish bank employees. Usable responses were received from 404 respondents and subjected to exploratory factor analysis. Structural Equation Modeling (SEM) was used to undertake a confirmatory factor analysis of the emergent five-factor model. Findings: Results indicate front line employee performance is multi-faceted and comprised of civility, assurance and reliability, customer orientation, as well as extra-role behaviour and anti-role behaviour, or sabotage. Research limitations/implications: This exploratory study focuses on the Irish banking sector. To explore the generalisabilty of results, replication studies among other samples of branch banking employees in other countries are in order. Moreover, our survey is limited to the views of branch employees. We advocate research among bank managers and customers to triangulate potentially divergent views about performance. Practical implications: Findings have implications for recruitment, training and rewards. To ensure new hires are service minded, managers must consider their potential for extra-role or sabotage behaviour. Employees who demonstrate extra-role behaviours must be rewarded to encourage the adoption of such behaviours. Managers must also seek to minimise job stress in order to curtail anti-role behaviours. Originality/value: This paper offers insights into employees' views about their own performance at the front line. It extends the conceptualisation of service quality, by considering extra-role behaviour and sabotage as components of employee performance. © Emerald Group Publishing Limited.

Energy conversion assessment of vacuum, slow and fast pyrolysis processes for low and high ash paper waste sludge

The performance of vacuum, slow and fast pyrolysis processes to transfer energy from the paper waste sludge (PWS) to liquid and solid products was compared. Paper waste sludges with low and high ash content (8.5 and 46.7 wt.%) were converted under optimised conditions for temperature and pellet size to maximise both product yields and energy content. Comparison of the gross energy conversions, as a combination of the bio-oil/tarry phase and char (ECsum), revealed that the fast pyrolysis performance was between 18.5% and 20.1% higher for the low ash PWS, and 18.4% and 36.5% higher for high ash PWS, when compared to the slow and vacuum pyrolysis processes respectively. For both PWSs, this finding was mainly attributed to higher production of condensable organic compounds and lower water yields during FP. The low ash PWS chars, fast pyrolysis bio-oils and vacuum pyrolysis tarry phase products had high calorific values (∼18-23 MJ kg-1) making them promising for energy applications. Considering the low calorific values of the chars from alternative pyrolysis processes (∼4-7 MJ kg-1), the high ash PWS should rather be converted to fast pyrolysis bio-oil to maximise the recovery of usable energy products.

„Mennyit ér” a fenntarthatóság? – Esettanulmány az externális hatások mérésére azok internalizálására (What is sustainability worth? – A case study of measuring and internalizing negative environmental effects of logistics operation)

A fenntarthatóság központi kérdés a gazdálkodástudományban, ezen belül a logisztikában, hiszen a környezetre rótt szennyezésben e vállalati működési területnek is jelentős a szerepe. A szerzők dolgozata egy konkrét hazai esettanulmány segítségével vizsgálja a kérdéskört. Azt elemzik, vajon egy, az Európai Unióban is új kamiontípus (az ún. EuroCombi) alkalmazása a logisztikai folyamatokban milyen externális hatásokkal jár. Elemzésükben kísérletet tesznek ezeknek az externális hatásoknak a pénzben kifejezett mérésére. Azért fontos mindez, mert e mérés és számszerűsítés nélkül lehetetlen ezeknek a hatásoknak az internalizálása, vagyis belsővé tétele. Így mérés nélkül sem az érintett vállalatok tulajdonosai, sem azok belső döntéshozói, de a külső szabályozó szereplők sem tudják bevonni e hatásokat gazdasági döntéseikbe. Ez a mérés nem egyszerű feladat, de nem is lehetetlen. Mindenképpen alapját, előfeltételét képezi azonban annak, hogy ilyen jellegű döntéseknél az érintettek a társadalmi, környezeti érdekeket is érvényesíteni tudják. ____ Sustainability is a key issue today both for practitioners and researchers. This is true especially for logisticians. Logistics is a function that has a significant CO2 emission and also destructs transportation infrastructure that burden our environment. The article is focusing on these issues with the help of a Hungarian case study. It analysis the effect of applying a new, long and heavy type of truck, called EuroCombi. It presents a methodology usable for measuring these negative external effects in Forint. Without proper measurement internalization of costs these externalities generate is impossible. As it will be presented in details, such a measurement is although not very easy but achievable.

A szénlábnyom mérése – Fókuszban a közúti áruszállítás és raktározás (Measurement the carbon footprint – focus on road transport and warehousing)

Mai világunkban egyre több olyan erőforrást élünk fel, amelyek hatását az otthonunknak számító Föld egyszerűen már nem képes helyreállítani. Ebben számos jelenség mellett a gazdaság globalizációja, az élesedő versenyhelyzet, a fogyasztói társadalom további térnyerése, ebből adódóan pedig a logisztikai folyamatok intenzitásának növekedése kulcsszerepet játszik. A logisztikát érő kritikáknak ösztönözniük kell a vállalatok szakembereit arra, hogy változtassanak ezen. Ehhez elengedhetetlen a jelenlegi működés szénlábnyomának mérése. Csak a jelenállapot felmérése szolgálhat alapjául a fejlesztéseknek. A szerzők tanulmányának célja a szénlábnyomszámítás egy gyakorlati alkalmazásának ismertetése. Esettanulmány jelleggel bemutatják egy nagy nemzetközi vállalat hazai leányvállalatának a szénlábnyom-számítása során alkalmazott módszertanát. A számítások során a vállalat disztribúciós logisztikai folyamataira fókuszálnak, kiemelten vizsgálták a közúti szállítás és a raktározás széndioxid-kibocsátását. Számításaikban igyekeztek pontosak lenni, a hazai energiamixre számolt legfrissebb konverziós faktorokkal számoltak. Meggyőződésük, hogy az ilyen esettanulmányok hasznosak, hiszen a bemutatott módszertan mintául, útmutatásul szolgálhat további vállalatok számára. Reményeik szerint ezzel segíthetik, hogy minél több hazai vállalat kezdje el széndioxid-kibocsátásának szisztematikus és tudományos alapokon nyugvó mérését. ____ Due to globalization, intense competition and the consumer society logistics processes have been intensified during the last decades. This led to increased environmental strain generating intense criticism towards logistics profession. In order to decrease the environmental burden of logistics several professionals and companies have tried to make progress in this field and introduced techniques that are capable to measure the Carbon Footprint of logistics. Still public case studies are very limited. The paper presents the case of the Hungarian subsidiary of a big multinational FMCG firm. Calculations are built on the actual conversion factor developed for the Hungarian energy mix. A complex set of key performance indi actors usable to capture key characteristics of the present situation is presented. Not only the constructs of these KPIs are described in the paper but a detailed description of methodology used to calculate them is also given. The authors hope such detailed case study description will help other companies as well to initiate sustainable logistics programs.

The use of treatment theories and procedures for postural control in adult with hemiplegia: A national survey

This study investigated the use of treatment theories and procedures for postural control training used by Occupational Therapists (OTs) when working with hemiplegic adults who have had cerebrovascular accident (CVA) or traumatic brain injury (TBI). The method of data collection was a national survey of 400 randomly selected physical disability OTs with 127 usable surveys returned. Results showed that the most common used treatment theory was neurodevelopmental treatment (NDT), followed by motor relearning program (MRP), proprioceptive neuromuscular facilitation (PNF), Brunnstrom's approach, and the approach of Rood. The most common treatment posture used was sitting, followed by standing, mat activity, equilibrium reaction training, and walking. The factors affecting the use of various treatment theories procedures were years certified, years of clinical experience, work situation and work status. Pearson correlation coefficient analyses found significant positive relationships between treatment theories and postures. There were significant high correlations between usage of all pairs of treatment procedures. ^

Occupational stress in private schools: A teacher profile

The purpose of this study was threefold. The primary purpose was to develop a stress profile for teachers in private schools. This study also addressed two exploratory issues. The first, consisted of an examination of the possible differences in the levels of on-the-job stress among teachers in different types of private schools. A second issue was to discuss the findings on private school in light of the extant literature on public schools, specifically using the data collected by Fimain to develop the Teacher Stress Inventory. This study was conducted utilizing 316 full time teachers from seven schools from six different states.^ The instrument employed in this study was the Teacher Stress Inventory (TSI) developed by Fimian (1988). The TSI is a 10 factor, 49 item self-report measure. The 10 factors consist of five Stress Sources and five Stress measure. The 10 factors consist of five Stress Sources and five Stress Manifestations subscales. The mean for these 10 factors yields the stress construct termed "Total Stress." Of the 437 surveys mailed, 316 usable surveys, i.e., 72.3%, were returned.^ The results suggest that private school teachers experience moderate levels of stress. The mean score was 2.27 indicating a lower than average stress level as measured by the TSI. Comparisons between types of private schools revealed that there were no significant differences between the stress levels of teachers in boarding and nonboarding schools. Teachers in large schools experience significantly higher levels of stress than teachers in small and medium size schools. However, the measurable difference between them translates into a very small difference in terms of the real stress levels of these teachers in their professional lives. A significant difference was also found between the stress levels of public $(M=2.60)$ and private school teachers $(M=2.27).$ Both means fall within the moderate range, however, while private school teachers experience lower than average levels of stress, the stress levels of teachers in public schools falls in the higher than average range.^ Recommendations for reducing stress levels in both private and public schools are presented as well as suggestions for future research. ^

Refinement methods for software architecture design using the software architecture model

Modern software systems are often large and complicated. To better understand, develop, and manage large software systems, researchers have studied software architectures that provide the top level overall structural design of software systems for the last decade. One major research focus on software architectures is formal architecture description languages, but most existing research focuses primarily on the descriptive capability and puts less emphasis on software architecture design methods and formal analysis techniques, which are necessary to develop correct software architecture design. ^ Refinement is a general approach of adding details to a software design. A formal refinement method can further ensure certain design properties. This dissertation proposes refinement methods, including a set of formal refinement patterns and complementary verification techniques, for software architecture design using Software Architecture Model (SAM), which was developed at Florida International University. First, a general guideline for software architecture design in SAM is proposed. Second, specification construction through property-preserving refinement patterns is discussed. The refinement patterns are categorized into connector refinement, component refinement and high-level Petri nets refinement. These three levels of refinement patterns are applicable to overall system interaction, architectural components, and underlying formal language, respectively. Third, verification after modeling as a complementary technique to specification refinement is discussed. Two formal verification tools, the Stanford Temporal Prover (STeP) and the Simple Promela Interpreter (SPIN), are adopted into SAM to develop the initial models. Fourth, formalization and refinement of security issues are studied. A method for security enforcement in SAM is proposed. The Role-Based Access Control model is formalized using predicate transition nets and Z notation. The patterns of enforcing access control and auditing are proposed. Finally, modeling and refining a life insurance system is used to demonstrate how to apply the refinement patterns for software architecture design using SAM and how to integrate the access control model. ^ The results of this dissertation demonstrate that a refinement method is an effective way to develop a high assurance system. The method developed in this dissertation extends existing work on modeling software architectures using SAM and makes SAM a more usable and valuable formal tool for software architecture design. ^

“Namastey London”: Bollywood Movies and Their Impact on how Indians Perceive European Destinations

The aim of this study is to analyze the perception of European destinations through the eyes of Indian Bollywood film viewers to determine how perception is influenced by what is viewed in films. Researchers surveyed Indian consumers and collected 670 usable surveys. European destinations were divided into top five and bottom five destinations for Indian tourists, and data was then compared to world tourism statistics. Results indicate differences in destination preference among Bollywood viewers and worldwide tourist trends. Findings indicate that prominently featuring a landscape within Bollywood films can significantly impact Indians’ perception on the destinations’ image. European countries frequently portrayed in films have higher marks on multiple perception categories than those not featured in blockbuster Bollywood films.