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Ett bibliotek i takt med tiden : Linköpings universitetsbibliotek 50 år
- 2018
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Samlingsverk (redaktörskap) (övrigt vetenskapligt/konstnärligt)abstract
- Linköpings universitetsbibliotek (LiUB) firar år 2019 sitt 50-årsjubileum. År 1969 grundades Linköpings högskolas bibliotek, som 1975 blev universitetsbibliotek.Med hjälp av ett antal nedslag baserade på personliga hågkomster, intervjuer, dokument och publicerat material skildras i denna jubileumsskrift bibliotekets första 50 år. Linköpings högskolas bibliotek blev under 1970-talet känt för den så kallade Linköpingsmodellen och för försöken med bibliotekssystemet LIBRIS. Datoriseringens och digitaliseringens betydelse fram till våra dagar kan knappast överskattas.Boken berättar om ett antal av de kvartersbibliotek som funnits vid LiUB: bland annat de vid Campus Valla och de lärar- och förskollärarutbildningsbibliotek som blev en del av LiUB i samband med högskolereformen 1977. I två personligt hållna bidrag skildras det medicinska bibliotek som byggdes upp vid det 1986 grundade Hälsouniversitetet och bibliotekariens roll vid den tvärvetenskapliga Temainstitutionen. Under 1990-talet expanderade LiU i Norrköping och de kvartersbibliotek som tidigare funnits i staden slogs 1998 samman till Campus Norrköpings bibliotek.Andra bidrag skildrar användarundervisningens idéhistoria och hur den återspeglas i de undervisningsupplägg som praktiserats vid LiUB sedan början av 1970-talet. År 1979 blev Linköpings universitetsbibliotek genom en lagändring mottagare av pliktexemplar, vilket förändrade förutsättningarna för bibliotekets litteraturförsörjning. Andra verksamheter knutna till LiUB som skildras är det Centrum för biblioteks- och IT-pedagogik som under det tidiga 2000-talet arrangerade poänggivande kurser och det 1996 inrättade elektroniska förlaget LiU E-Press. I en intervju berättar personal om det bibliometriarbete som sedan 2007 utförs vid Linköpings universitetsbibliotek.I boken presenteras också några specialsamlingar, däribland DDR-samlingen och Stolpesamlingen.Temat i bokens avslutande del är framtidsvisioner och återblickar. Hur har man föreställt sig bibliotekets framtid i det förgångna? Hur har universitetsbibliotekets roll förändrats och vad står för dörren under den närmaste framtiden?
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- Abdalla, Maie, et al.
(författare)
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Anorectal Function After Ileo-Rectal Anastomosis Is Better than Pelvic Pouch in Selected Ulcerative Colitis Patients
- 2020
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Ingår i: Digestive Diseases and Sciences. - : Springer-Verlag New York. - 0163-2116 .- 1573-2568. ; , s. 250-259
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: With a lifelong perspective, 12% of ulcerative colitis patients will need a colectomy. Further reconstruction via ileo-rectal anastomosis or pouch can be affected by patients' perspective of their quality of life after surgery.AIM: To assess the function and quality of life after restorative procedures with either ileo-rectal anastomosis or ileal pouch-anal anastomosis in relation to the inflammatory activity on endoscopy and in biopsies.METHOD: A total of 143 UC patients operated with subtotal colectomy and ileo-rectal anastomosis or pouches between 1992 and 2006 at Linköping University Hospital were invited to participate. Those who completed the validated questionnaires (Öresland score, SF-36, Short Health Scale) were offered an endoscopic evaluation including multiple biopsies. Associations between anorectal function and quality of life with type of restorative procedure and severity of endoscopic and histopathologic grading of inflammation were evaluated.RESULTS: Some 77 (53.9%) eligible patients completed questionnaires, of these 68 (88.3%) underwent endoscopic evaluation after a median follow-up of 12.5 (range 3.5-19.4) years after restorative procedure. Patients with ileo-rectal anastomosis reported better overall Öresland score: median = 3 (IQR 2-5) for ileo-rectal anastomosis (n = 38) and 10 (IQR 5-15) for pouch patients (n = 39) (p < 0.001). Anorectal function (Öresland score) and endoscopic findings (Baron-Ginsberg score) were positively correlated in pouch patients (tau: 0.28, p = 0.006).CONCLUSION: Patients operated with ileo-rectal anastomosis reported better continence compared to pouches. Minor differences were noted regarding the quality of life. Ileo-rectal anastomosis is a valid option for properly selected ulcerative colitis patients if strict postoperative endoscopic surveillance is carried out.
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- Ahmadi, Alireza, et al.
(författare)
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An overview of trends in aircraft maintenance program development : past, present, and future
- 2007
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Ingår i: Risk, Reliability and Societal Safety. - London : Taylor and Francis Group. - 9780415447867 ; , s. 2067-2076
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Konferensbidrag (refereegranskat)abstract
- The purpose of this paper is to describe the trends in aircraft maintenance program development during the last 50 years, including the reasons for the aircraft industry to change its view of maintenance. The major milestones and fundamental reasons for such development are also discussed and illustrated in relation to a flow diagram, which shows the logical and chronological order of the trends. Finally, the paper describes some possibilities and challenges as regards applying Information & Communication Technology (ICT) within the emerging approach of e-Maintenance in order to enhance the surveillance of aircraft maintenance program performance.
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- Ahmadi, Alireza, et al.
(författare)
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Assessment of the operational consequences of aircraft failures : using event tree analysis
- 2008
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Ingår i: 2008 IEEE Aerospace Conference. - Piscataway, NJ : IEEE Communications Society. - 9781424414871 ; , s. 1-14
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Konferensbidrag (refereegranskat)abstract
- The purpose of this paper is to describe a methodology that supports an assessment of the operational consequences of failures in aircraft systems and its associated costs, in order to facilitate a correct and efficient decision-making during cost-effectiveness analysis of maintenance tasks within scheduled aircraft maintenance program development. The paper is based on empirical studies of possible scenarios from aircraft failure to operational consequences in commercial airlines. Empirical data was extracted through document studies and interviews, guided by the application of an Event Tree Analysis (ETA). The analysis was performed together with experienced practitioners from both an aircraft manufacturer and commercial airlines, which contributed to a continuous verification of the outcomes of the study. The proposed methodology, which is based on ETA, is considered as a valuable support in the assessment of the operational consequences of failures within a MSG-3 framework. The proposed methodology focuses on assessing the operational consequences of failures and associated economical losses. Hence, in order to enable an estimation of the maintenance tasks' cost-effectiveness, the methodology should be further developed to include a cost assessment of the applicable maintenance tasks. The proposed methodology could be adapted as a support to those involved in the development of aircraft maintenance program. The operational consequences and the probabilities of the proposed event tree can be quantified by the aid of historical data or expert judgment.
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- Ahmadi, Alireza, et al.
(författare)
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Integration of RCM and PHM for the next generation of aircraft
- 2009
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Ingår i: 2009 IEEE Aerospace Conference. - Piscataway, NJ : IEEE Communications Society. - 9781424426218
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Konferensbidrag (refereegranskat)abstract
- With global cuts in defense budgets, air forces have to sustain the same level of readiness with a reduced number of aircraft. To succeed with this challenge, it is not sufficient to improve current maintenance concepts, but new ones also have to be introduced.Traditionally, the development of on-board functions and maintenance concepts has been performed rather independently. The new approach is to focus on an integration of these two developments and to adapt a life cycle view together with a disregard of organizational boundaries.To facilitate the necessary change, a study is performed by Saab and Luleå University of Technology. The study focuses on the possibilities to integrate RCM and PHM in a cost-effective way. The aim is to reduce the workload of maintenance development and to find out how to combine RCM and PHM to achieve a joint development of the aircraft and its maintenance program throughout the aircraft's whole life cycle.The paper describes some similarities and differences between RCM and PHM. Furthermore, the paper describes some aspects of how RCM and PHM are complementing each other and what kind of adaptations that has to be done to achieve a successful integration. For example, a good application of RCM early in system design might generate a pull for PHM-technology integration and motivate design changes of the aircraft. Simultaneously, available PHM-technologies might strongly affect the selection of applicable and effective maintenance tasks in the development of the initial maintenance program. PHM might also support a surveillance of the maintenance program's performance. The description is highlighted with examples and experiences from the Swedish Gripen fighter aircraft. Finally, the paper also outlines some suggestions for further research.
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| 7. |
- Ahmadi, Alireza, et al.
(författare)
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On aircraft scheduled maintenance program development
- 2010
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Ingår i: Journal of Quality in Maintenance Engineering. - : Emerald. - 1355-2511 .- 1758-7832. ; 16:3, s. 229-255
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Tidskriftsartikel (refereegranskat)abstract
- Purpose – The purpose of this paper is to present issues and challenges of scheduled maintenance task development within the maintenance review board (MRB) process, and to find potential areas of improvement in the application of the MSG-3 methodology for aircraft systems. Design/methodology/approach – The issues and challenges as well as potential areas of improvement have been identified through a constructive review that consists of two parts. The first part is a benchmarking between the Maintenance Steering Group (MSG-3) methodology and other established and documented versions of reliability-centred maintenance (RCM). This benchmarking focuses on the MSG-3 methodology and compares it with some RCM standards to identify differences and thereby find ways to facilitate the application of MSG-3. The second part includes a discussion about methodologies and tools that can support different steps of the MSG-3 methodology within the framework of the MRB process. Findings – The MSG-3 methodology is closely related to the RCM methodology, in which the anticipated consequences of failure are considered for risk evaluation. However, MSG-3 considers neither environmental effects of failures nor operational consequences of hidden failures. Furthermore, in MSG-3, the operational check (failure-finding inspection) is given priority before all other tasks, whereas in RCM it is considered as a default action, where there is no other applicable and effective option. While RCM allows cost-effectiveness analysis for all failures that have no safety consequences, MSG-3 just allows it for failures with economic consequences. A maintenance program that is established through the MRB process fulfils the requirements of continuous airworthiness, but there is no foundation to claim that it is the optimal or the most effective program from an operator’s point-of-view. The major challenge when striving to achieve a more effective maintenance program within the MRB process is to acquire supporting methodologies and tools for adequate risk analysis, for optimal interval assignments, and for selection of the most effective maintenance task. Originality/value – The paper presents a critical review of existing aircraft scheduled maintenance program development methodologies, and demonstrates the differences between MSG-3 and other RCM methodologies.
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- Ahmadi, Alireza, et al.
(författare)
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Risk of operational consequences of aircraft system failure
- 2010
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Ingår i: International Journal of Performability Engineering. - 0973-1318. ; 6:2, s. 149-158
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Tidskriftsartikel (refereegranskat)abstract
- The purpose of this paper is to describe a methodology for identifying different operational consequences and associated costs caused by aircraft system failure, in order to facilitate and enhance the capability of taking correct and efficient decisions when analyzing the cost-effectiveness of maintenance tasks. The paper focuses on the operational consequences of failures that lead to delay. To identify the operational consequences of aircraft system failures, Empirical studies of possible scenarios involving aircraft failures and their operational consequences for a commercial airline have been performed. Empirical data were extracted through document studies and interviews, guided by the application of an Event Tree Analysis (ETA). In order to effectively utilize the knowledge of field experts in the assessment process, a pairwise comparison technique was adopted for quantifying the contribution of different factors to the operational. The work was performed together with experienced practitioners from both an aircraft manufacturer and commercial airlines, which contributed to a continuous verification of the outcome of the study.The study shows that the proposed methodology based on ETA and pairwise comparison can be used to identify and quantify the cost of operational consequences of failures in aircraft operation, when there is no sufficient and reliable data.
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| 9. |
- Aldenlöv, Jens, et al.
(författare)
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Public procurement of railway infrastructuremaintenance : a literature review
- 2017
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Ingår i: Proceedings of the 9th Nordic Conference on Construction Economics and Organization. - Lyngby : Polyteknisk Boghandel og Forlag. - 9788750211259 ; , s. 10-21
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Konferensbidrag (refereegranskat)abstract
- The maintenance of railway infrastructure has in several instances been changed from government-based to being based on public procurement, with varying degrees of flexibility for the contractor to design their maintenance work. The purpose of-giving contractors a larger freedom of choice of how to perform maintenance is to stimulate them to innovate and develop their maintenance processes. Since the contracts differ in between and there are changes in government policies over time that affects both existing and new contracts, a comparison between different contracts becomes challenging. A literature review has been conducted to understand the change in procurement strategy and how to encourage contractors to innovate. The research questions include: What procurement strategies are there? How is maintenance evaluated? How does procurement affect the innovation opportunities for entrepreneurs?The literature review focuses on railway maintenance and contract design between client and contractor. In total, 17 articles matched the search criteria and were selected for the review. To have successful maintenance service, five articles suggested partnering as a strategy with common goals in combination with good communication during the entirety of the contract. When selecting incentive plan, four articles mentions that a focus on performance-based incentives in combination with riskmanagement is better rather than actual payment schemes. The reason being that payment is often themain cause of conflicts between client and contractor. The scientific literature suggests that improvement in incentives improves quality of maintenance, decreases delays and technical failures. The conclusion from the literature review is that partnering in railway maintenance is considered successful. With accurate knowledge about railway assets the incentive plan becomes accurate which reduces costs.The literature review is a part of a research project with an overall goal to develop a model to guide the selection of appropriate type of procurement strategy, contract and control of maintenance for a moresustainable railway system.
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| 10. |
- Andersson, Magnus V., et al.
(författare)
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Kirurgi – omistligt komplement till medicinsk behandling
- 2009
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Ingår i: Läkartidningen. - 0023-7205 .- 1652-7518. ; 106:45, s. 3003-9
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Tidskriftsartikel (refereegranskat)abstract
- Kirurgi på rätt indikation och vid rätt tidpunkt är ett omistligt komplement till medicinsk behandling vid inflammatorisk tarmsjukdom, som förebygger sjukdomskomplikationer, förbättrar patienternas livskvalitet och ibland är livräddande. Kirurgi för ulcerös kolit görs oftast som ett tvåstegsförfarande: först kolektomi plus ileostomi med rektum lämnad intakt och i senare skede, med optimerad patient, tarmrekonstruktion anpassad efter patientens individuella livssituation. Kirurgi vid Crohns sjukdom korrigerar komplikationer (stenoser och fistlar) och sparar tarm genom begränsade resektioner och strikturplastiker. Laparoskopisk kirurgi verkar ha viktiga fördelar vid primära tarmresektioner. Modern medicinsk behandling har förändrat indikationerna men ännu inte minskat behovet av kirurgi. Pågående antiinflammatorisk och immunmodulerande behandling är viktig att beakta i samband med kirurgi. Ett nära samspel mellan gastroenterolog och kolorektalkirurg är nödvändigt för att uppnå bästa möjliga långtidsprognos för de individer som lever med IBD.
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