Relevant bibliographies by topics / Fibro Test

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Academic literature on the topic 'Fibro Test'

Author: Grafiati
Published: 4 June 2021
Last updated: 3 February 2022

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Journal articles on the topic "Fibro Test"

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Buivydienė, Arida, Viktorija Basytė, and Jonas Valantinas. "Non-invasive serum markers and transient elastography in staging advanced chronic hepatitis C." Acta medica Lituanica 22, no. 4 (January 31, 2016): 188–95. http://dx.doi.org/10.6001/actamedica.v22i4.3237.

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Objectives. In the past decade researchers are presenting indirect non-invasive serum markers for liver fibrosis and cirrhosis evaluation. Our aim was to evaluate effectiveness in staging advanced liver disease when using transient elastography and nine non-invasive serum markers: APRI, FIB-4, ASPRI, LSPS, P2/MS, FibroQ, Fibro-α, Pohl, CDR. Methods. 162 patients with hepatitis C infection were included in this study. Patients were divided in two groups, regarding histopathologic results: advanced liver fibrosis and cirrhosis. The following laboratory measures were obtained in all patients: ALT, AST, albumin, total bilirubin, alkaline phosphatase, gamma glutamyl transferase, INR, hemoglobin, platelet count, alfa fetoprotein, segmented neutrophils count and percentage and monocytes percentage. Transient elastography and nine non-invasive serum markers – APRI, FIB-4, ASPRI, LSPS, P2/MS, FibroQ, Fibro-α, Pohl, CDR – were compared with the results of the histopathological examination. A statistical analysis was done using the Student t-test, the Spearman’s rank correlation and the area under receiver-operating characteristic curves (AUROCs). Results. All nine non-invasive markers correlated significantly with the liver fibrosis stage (P
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Adrianti, Evy, Liong Boy Kurniawan, and Ibrahim Abdul Samad. "COMPARISONS OF FIBRO Q INDEX AND FIB-4 IN VARIOUS STAGES OF CHRONIC B HEPATITIS." INDONESIAN JOURNAL OF CLINICAL PATHOLOGY AND MEDICAL LABORATORY 25, no. 1 (April 10, 2019): 68. http://dx.doi.org/10.24293/ijcpml.v25i1.1508.

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Fibro Q and FIB-4 index are non-invasive biomarkers to evaluate liver fibrosis in chronic hepatitis. This study aimed to evaluate and compare the diagnostic accuracies of Fibro Q and FIB-4 index compared with fibroscan in chronic B hepatitis. This research was a cross-sectional study including 145 patients with chronic B hepatitis who had a fibroscan examination at the Dr.Wahidin Sudirohusodo Hospital during July 2014-June 2016. The clinical data included sex, age, Aspartate aminotransferase (AST), Alanine aminotransferase (ALT), platelet, Prothrombin Time (PT)/International Normalized Ratio (INR). Fibro Q and FIB-4 index were compared with fibroscan to predict various fibrotic degrees of chronic B hepatitis patients. There were significant differences compared to fibroscan, the highest Fibro Q average was found in the medium degree of fibrosis and the lowest in the normal fibroscan (p<0.01) while the highest FIB-4 average was found in the high degree of fibrosis and the lowest in the normal fibroscan (p<0.001). Fibro Q sensitivity and specificity test against fibroscan have AUC value of 0.579 by using a 9.33 cut-off with a sensitivity of 80.5% and specificity of 28.1%, while FIB-4 has AUC value of 0.723 by using cut-off 14.31 with sensitivity 80.5% and specificity 46.9%. These results show that both Fibro Q and FIB-4 index can be used to assess liver cirrhosis as well as fibroscan. FIB-4 Index has a better diagnostic value compared to Fibro Q, so this marker can be used as a simple screening instrument.
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Trilianos, Panagiotis, Adamantios Tsangaris, Augustine Tawadros, Vrushak Deshpande, and Nikolaos Pyrsopoulos. "The Reliability of Fibro-test in Staging Orthotopic Liver Transplant Recipients with Recurrent Hepatitis C." Journal of Clinical and Translational Hepatology X, no. X (February 2, 2020): 1–4. http://dx.doi.org/10.14218/jcth.2019.00038.

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NAKAMURA, R., E. HORII, T. IMAEDA, E. NAKAO, H. KATO, and K. WATANABE. "The Ulnocarpal Stress Test in the Diagnosis of Ulnar-Sided Wrist Pain." Journal of Hand Surgery 22, no. 6 (December 1997): 719–23. http://dx.doi.org/10.1016/s0266-7681(97)80432-9.

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Forty-five patients with persistent ulnar-sided wrist pain and a positive ulnocarpal stress test were investigated by X-ray, arthrography, 99mTechnetium bone scanning, magnetic resonance imaging and wrist arthroscopy. Ulnar wrist pathology was positively identified in nine of 45 patients by X-ray, 18 of 37 by arthrography, 19 of 27 by bone scan, four of 33 by MRI, and in all 45 patients by arthroscopy. The final diagnosis was ulnocarpal abutment syndrome in 28 patients, traumatic triangular fibro-cartilage (TFC) tear in six, lunotriquetral (LT) ligament tear in five, TFC and LT ligament tear in one, wrist arthritis in four and cartilaginous free body in one. The ulnocarpal stress test is a useful provocative test, and a positive test suggests the presence of ulnar-sided wrist pathology. The test is sufficiently sensitive to warrant further investigation by arthroscopy.
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Ayyali, Ambresh, and Shilpa A. "Assesmentof Fibro Q test, AAR & APRI indices as markers of fibrosis in chronic liver disease." IP Indian Journal of Neurosciences 7, no. 1 (March 15, 2021): 39–43. http://dx.doi.org/10.18231/j.ijn.2021.007.

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Ray, M. J., and I. R. Smith. "The Dependence of the International Sensitivity Index on the Coagulometer Used to Perform the Prothrombin Time." Thrombosis and Haemostasis 63, no. 03 (1990): 424–29. http://dx.doi.org/10.1055/s-0038-1645059.

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SummaryThis study was designed to detect any effect that different types of coagulation instrument may have on the International Sensitivity Index (ISI) of a thromboplastin.Manufacturers of commercial thromboplastins now calibrate their reagents against the World Health Organization international reference preparation to assign them an IST. This enables the prothrombin time (PT) estimated with that reagent to be expressed as an International Normalised Ratio (INR).One batch of Thromborel S was calibrated against the Australasian Reference Thromboplastin (ART). The Thromborel S was used on three photo-optical instruments, the Automated Coagulation Laboratory (ACL) (Instrumentation Laboratory), the Cobas Fibro (Roche), and the Coag-a-Pet (General Diagnostics). PTs using ART were performed manually using the reference method.The ISIs calibrated in our laboratory when the ACL and Cobas Fibro were used were not significantly different at the 95% level, being 1.102 ± 0.018 and 1.134 ± 0.022 respectively. The ISI with the Coag-a-Pet of 1.223 ± 0.023 was significantly different to that of the ACL and the Cobas Fibro at the 95% level.The flowcharts for a computer program to perform the necessary calculations are provided. The program allows for the entry and editing of data from the calibration procedure, and provides a mean normal PT and normal range, the ISI and 95% confidence limits of the calibration, and a chart for the conversion of the test PTs to INRs.The authors have made available an IBM compatible program for the calibration of thromboplastins.
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Bissell, M. G. "A Prospective Analysis of the Prognostic Value of Biomarkers (Fibro Test) in Patients with Chronic Hepatitis C." Yearbook of Pathology and Laboratory Medicine 2008 (January 2008): 347–51. http://dx.doi.org/10.1016/s1077-9108(08)70751-5.

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Fishman, M. B., V. E. Karev, V. Yan, D. A. Sokolova, A. I. Mitsinskaya, and M. A. Mitsinskiy. "METABOLIC SURGERY IN CORRECTION OF FATTY LIVER DISEASE." Grekov's Bulletin of Surgery 176, no. 1 (February 28, 2017): 34–41. http://dx.doi.org/10.24884/0042-4625-2017-176-1-34-41.

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The article presents the results of treatment of 68 patients who underwent laparoscopic sleeve gastric resection (LSG) and laparoscopic gastric bypass (LGB) at the period from 2014 to 2015. The efficacy of operations on the course of nonalcoholic fatty liver disease (NAFLD) was estimated. There were performed a liver biopsy and histological studies with determination of histological activity index, the rate of severity of fibrosis according R. G. Knodell scale and METAVIR system, nature and degree of manifestation of steatosis of hepatocytes and intrahepatic cholestasis. NAS activity scale was used to evaluate morphological changes. The results of 1,5-year follow-up study were assessed in dynamics. Fibro Test results were in the range from 0 to 1 depending of fibrosis severity using METAVIR system (from F0 to F4), Knodell and Ishak scales. It was stated that there was an improvement of histological and functional findings in cases of hepatic steatosis, inflammation and fibrosis. All the patients (100%) initially had the signs of NAFLD and 12 patients (22,6%) - fibrosis. The complete regression of NAFLD was noted in 43(81,1%) cases and signs of previous fibrosis were smoothed over in 6 patients (41%). Liver function tests have deteriorated at 6-month period, but tests improved to normal rates at the end of 1-year period. The bariatric surgeries are effective methods of NAFLD treatment and Fibro Test is non-invasive and reliable method of liver state assessment.
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Vallecillo, Cristina, Manuel Toledano-Osorio, Marta Vallecillo-Rivas, Manuel Toledano, and Raquel Osorio. "In Vitro Biodegradation Pattern of Collagen Matrices for Soft Tissue Augmentation." Polymers 13, no. 16 (August 7, 2021): 2633. http://dx.doi.org/10.3390/polym13162633.

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Collagen matrices have become a great alternative to the use of connective tissue grafts for soft tissue augmentation procedures. One of the main problems with these matrices is their volume instability and rapid degradation. This study has been designed with the objective of examining the degradation of three matrices over time. For this purpose, pieces of 10 × 10 mm2 of Fibro-Gide, Mucograft and Mucoderm were submitted to three different degradation tests—(1) hydrolytic degradation in phosphate buffer solution (PBS); (2) enzyme resistance, using a 0.25% porcine trypsin solution; and (3) bacterial collagenase resistance (Clostridium histolyticum)—over different immersion periods of up to 50 days. Weight measurements were performed with an analytic microbalance. Thickness was measured with a digital caliper. A stereomicroscope was used to obtain the matrices’ images. ANOVA and Student–Newman–Keuls tests were used for mean comparisons (p < 0.05), except when analyzing differences between time-points within the same matrix and solution, where pair-wise comparisons were applied (p < 0.001). Fibro-Gide attained the highest resistance to all degradation challenges. The bacterial collagenase solution was shown to constitute the most aggressive test as all matrices presented 100% degradation before 14 days of storage.
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Rahmafitria, Rahmafitria, Mutmainnah Mutmainnah, and Ibrahim Abdul Samad. "TOLAK UKUR FUNGSI HATI BERDASARKAN DERAJAT FIBROSIS PENYAKIT HATI KRONIS (Liver Function Parameters based on Degree of Liver Fibrosis in Chronic Liver Disease)." INDONESIAN JOURNAL OF CLINICAL PATHOLOGY AND MEDICAL LABORATORY 21, no. 1 (April 15, 2018): 57. http://dx.doi.org/10.24293/ijcpml.v21i1.1260.

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Evaluating the degree of liver fibrosis degree is invasive as well as uncomfortable, therefore, non invasive examinations such as liverfunction tests and elastography (Fibro Scan) as a predictor‘s device of liver fibrosis degree are necessary. The aim of this study was toknow the differences of liver function parameters based on the fibrosis degree in patients with chronic liver disease. This study was a crosssectional design using data from chronic liver disease patients treated at the Dr. Wahidin Sudirohusodo Hospital. The elasticity of the liverwas measured using a fibro scan device during June 2010–July 2011. The analysis was carried out by ANOVA test on various parametersof liver function particularly on the fibrosis degree in chronic liver disease. In this study PT, albumin, total bilirubin and platelet countshowed a significant difference of 0.019, 0.009, 0.017 and 0.000 respectively. The mean values of PT and total bilirubin were significantlyhigher in the high degree of fibrosis compared to those with medium and low degree of fibrosis in the chronic liver disease patients. Basedon this study, the mean albumin levels and platelet count were significantly lower in the high degree of fibrosis compared with the mediumand low degree of fibrosis, however, no significant differences in AST, ALT, APTT and GGT were found.
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Dissertations / Theses on the topic "Fibro Test"

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Ngo, Kim Phuong Yen. "Valeur pronostique des biomarqueurs non-invasifs chez les sujets infectés par le virus de l'hépatite C ou B." Paris 6, 2008. http://www.theses.fr/2008PA066202.

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Les infections chroniques par le virus de l’hépatite B (VHB) et le virus de l’hépatite C (VHC) sont des problèmes majeurs de santé publique à l'échelle mondiale. Il est primordial d’améliorer l’évaluation de la gravité de ces hépatites chroniques pour mieux rationaliser la prise en charge des patients. La ponction biopsie hépatique (PBH) était jusqu’à présent le « gold standard » pour le diagnostic et le pronostic de la fibrose hépatique. Cependant ses nombreuses limitations, effets secondaires sévères, et une fréquence élevée de faux négatifs et de faux positifs, on conduit ces dernières années à l’élaboration de biomarqueurs, utilisés seuls ou en combinaison. Aucune estimation des valeurs pronostiques de ces marqueurs non-invasifs n’a été réalisée. Le but de notre thèse a été de démontrer la valeur pronostique du FibroTest-ActiTest (FT-AT) chez les patients infectés par le VHC et le VHB. Nous avons pu participer à deux travaux sur 2 populations distinctes: Une cohorte prospective de 537 patients ayant une infection chronique par le VHC, chez qui le stade de fibrose et le grade d’activité ont été évalués le même jour par une ponction biopsie hépatique et par FT-AT. Une cohorte prospective de 1300 patients ayant une infection chronique par le VHB, chez qui le stade de fibrose, le grade d’activité par FT-AT et la charge virale VHB ont été évalués le même jour. Le but de ces deux travaux principaux de ces quatre années de Thèse était d’estimer et de comparer les valeurs pronostiques des nouveaux biomarqueurs (FT-AT, Score APRI, Score de Forns) et du score pronostique « standard » classique (Score de Child-Pugh) pour prédire la survenue des complications et la survie chez les patients ayant une infection chronique par le VHB ou le VHC. Les analyses de survie, méthodes univariée et multivariée, ont estimé la valeur pronostique des stades de fibrose (estimés par biopsie hépatique et par biomarqueurs) et des autres facteurs potentiellement prédictifs de la survenue des complications de la cirrhose et de la survie. La durée de survie a été calculée à partir de la date du FT-AT à la date de la survenue du premier évènement (complications de la maladie, décès toutes causes et décès lié au foie); puis comparée à la survie attendue dans la population française (avec appariement sur l’âge, le sexe, l’année d’inclusion et la durée de suivi). Les valeurs pronostiques de la biopsie hépatique et des biomarqueurs ont été estimées et comparées par les aires sous les courbes pronostiques ROC (AUROC). RESULTATS Travail sur la cohorte de 537 patients atteints de l’hépatite chronique CRésultats à 5 ans de suivi (publication en 2005). Les patients avec fibrose sévère avaient une survie sans complications ou décès liés au VHC à 78. 5% (IC 95% = [71. 2%-85. 9%]; 28 complications ou décès liés au VHC) et une survie sans décès lié au VHC de 92. 7% (88. 0%-97. 3%; 9 décès liés au VHC). Les patients avec fibrose modérée avaient une survie sans complications ou décès liés au VHC à 98. 8% (96. 6%-100%; 1 complication, P<0. 001) et une survie sans décès lié au VHC à 100% (aucun décès lié au VHC; P<0. 001). Les patients avec fibrose minime avaient une survie sans complications ou décès liés au VHC à 100% (aucune complication liée au VHC; P<0. 001) et une survie sans décès lié au VHC à 100% (aucun décès lié au VHC; P<0. 001). Le FT avait une meilleure valeur pronostique par rapport à la biopsie, pour la survenue des complications avec une AUROC [IC 95%] =0. 96 [0. 93-0. 97] vs 0. 91 [0. 85-0. 94; P=0. 01] et pour la survenue de décès lié au VHC: AUROC = 0. 96 [0. 93-0. 98] vs 0. 87 [0. 70-0. 94; P=0. 046]. La valeur pronostique du FT était significativement plus élevée par rapport à celle des autres scores (APRI, Forns, Pugh) en analyse univariée (P<0. 001) et en régression logistique (P<0. 01) prenant en compte la réponse au traitement et les autres facteurs pronostiques connus (co-infection VIH, consommation d’alcool). Résultats à 8 ans de suivi (rédaction d’article en cours en 2008). Les patients avec fibrose sévère avaient une survie sans complications ou décès liés au VHC à 71. 0% (IC 95% = [63. 0%-79. 1%]; 39 complications ou décès liés au VHC) et une survie sans décès lié au VHC de 76. 5% (66. 8%-86. 2%; 24 décès liés au VHC). Les patients avec fibrose modérée avaient une survie sans complications ou décès liés au VHC à 97. 0% (93. 5%-100%; 3 complications ou décès liés au VHC, P<0. 0001) et une survie sans décès lié au VHC à 89. 3% (73. 6%-100%; 3 décès liés au VHC; P<0. 0001). Les patients avec fibrose minime avaient une survie sans complications ou décès liés au VHC à 99. 5% (98. 6%-100%; 1 complication; P<0. 0001) et une survie sans décès lié au VHC à 99. 5% (98. 6%-100%; 1 décès lié au VHC; P<0. 0001). FT avait une meilleure valeur pronostique par rapport à la biopsie, pour la survenue des complications ou décès liés au VHC avec une AUROC [IC 95%] = 0. 91 [0. 86-0. 94] vs 0. 77 [0. 66-0. 85; P=0. 0006] et pour la survenue de décès lié au VHC: AUROC = 0. 88 [0. 79-0. 92] vs 0. 66 [0. 49-0. 78; P=0. 0002]; et pour la survie globale: AUROC = 0. 75 [0. 64-0. 82] vs 0. 56 [0. 44-0. 66; P=0. 0002]. La valeur pronostique du FT restait significative en régression logistique (P<0. 001) prenant en compte la réponse au traitement et les autres facteurs pronostiques connus. Travail sur la cohorte de 1300 patients atteints de l’hépatite chronique B (Article en cours de soumission, version révisée en cours). Parmi les 1074 patients inclus, il a été observé 50 complications avec ou sans décès liés au foie [survie sans complications ou décès liés au foie = 93. 4% (IC 95% = 91. 4%-95. 4%)], 36 décès [survie sans décès= 95. 0% (93. 2%-96. 8%)] avec 27 décès liés au foie [survie sans décès liés au foie = 96. 1% (94. 4%-97. 8%)]. FT avait une meilleure valeur pronostique par rapport à la charge virale ou aux ALT pour la survenue des complications ou décès liés au foie [AUROC=0. 89 (IC 95% 0. 84-0. 93) vs 0. 64 (0. 55-0. 71) vs 0. 53 (0. 46-0. 60); (P<0. 0001)], et une meilleure valeur pronostique dans l’analyse multivariée [coefficient de régression 5. 2 (3. 5-6. 9; P<0. 0001) vs 0. 53 (0. 2-0. 9; P=0. 007) vs -0. 001 (-0. 003-0. 000; P=0. 052)]. Une nouvelle définition du statut de porteur inactif du VHB est proposée avec un algorithme associant la charge virale et le score de FibroTest-ActiTest. Ce nouvel algorithme présente une valeur prédictive négative à 100% pour les décès liés au foie et/ ou complications. Parmi les 275 patients classés porteurs inactifs d’après la définition classique, 62 patients (22. 5%) avaient une fibrose présumée par FT, et 3 sont décédés ou ont eu des complications dans les 4 ans du suivi. Chez les patients ayant une infection chronique par le VHC, le FibroTest est un marqueur biochimique de la sévérité de la maladie avec une valeur pronostique à cinq ans et à huit ans meilleure que celle de l’histologie pour la prédiction des complications et des décès liés au VHC. Chez les patients ayant une infection chronique par le VHB, le FibroTest a une valeur pronostique à quatre ans similaire à celle de la biopsie hépatique. La combinaison de FibroTest-ActiTest et la charge virale permet de définir avec plus de précision le pronostic et le statut de « porteur inactif » que la définition classique.
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Allsop, Thomas David Paul. "A fibre optical strain sensor." Thesis, University of Plymouth, 1999. http://hdl.handle.net/10026.1/2779.

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Strain-sensing elements, fabricated in standard communications-grade single mode optical fibre, are increasingly being considered for application in structural health monitoring. The reason for this is the numerous advantages demonstrated by these devices compared with traditional indicators. This thesis describes work carried out on optical sensors at the University of Plymouth. The aim of this work was to achieve an optical fibre strain sensing system capable of measuring absolute strain with good resolution and having wide dynamic range, without bulky optical equipment and not susceptible to misalignment due to handling. Earlier work was devoted to study on an intrinsic Fabry-Perot interferometric sensor and an optical phase-shift detection technique. The sensing element investigated relied on the end face of an optical fibre as one mirror and the second mirror being a layer of Titanium Dioxide (TO2). Although some results are included, it was soon realised that this sensor had a number of problems, particularly with fabrication. As no simple solution presented itself, consideration was given to a sensor that made use of the change in reflectance of an intra-core fibre Bragg grating when the grating was subjected to strain. The bulk of work described in this thesis is concerned with this type of sensing element. The grating structure is inherently flexible and a number of structural formats were studied and investigated. The first and simplest grating considered was two linearly chirped Bragg gratings used in a Fabry-Perot configuration (a grating resonator). The sensor was tested using the sensing detection system and although the fabrication problems were overcome absolute strain measurement was unattainable. To achieve this end, a theoretical study of a number of grating structures was carried out using the T-matrix Formalism. Confidence in using this approach was gained by comparing the spectral behaviour of a proposed grating with results, which were given by another theoretical model for the same proposed grating. The outcome of this study was that two structures in particular showed promise with regard to absolutism (the measure of true strain) and linearity. Discussions held with the department of Applied Physics at Aston University about fabrication resulted in one of the proposed designs being abandoned due to difficulties of fabrication. The second structure showed more promise and fabrication attempts were put in hand. This grating is linearly-chirped with a Top-hat function and a sinusoidal perturbation as a taper function of the refractive index modulation. Experiments were performed, data were acquired and system performance for this sensor is presented. The thesis concludes that using such a fibre Bragg grating as the sensing element of a strain sensing system enables it to measure absolute strain without using bulky optical equipment. At present, the resolution of strain is limited by the quality of the grating being fabricated (anomalies on profile), this should improve once the fabrication technique is refined.
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Saleh, Najia M. "Bond of glass fibre reinforced polymer bars in high strength concrete." Thesis, University of Bradford, 2018. http://hdl.handle.net/10454/17361.

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Very limited research studies have been conducted to examine bond of glass fibre reinforced polymer (GFRP) bars with high concrete strength. The current research project aims to compare between bond measured from a pull-out test and a hinged beam test for GFRP bars embedded in high strength concrete. Different parameters influencing bond such as GFRP bar diameter, embedment length and surface configuration were investigated in both test methods, while the bar position, i.e. top or bottom, was only studied in hinged beams. Seventy-two pull-out cubes, eight pull-out prisms and twenty-four hinged beams reinforced with GFRP bars were constructed and tested to failure. Twelve pull-out cubes and four hinged beams reinforced with steel bars were also tested for comparison purposes. The results showed that bond stress – slip curves obtained from various testing methods were similar, consisting of high initial stiffness, followed by nonlinear ascending and softening branches. In addition, it was found that the experimental bond strength obtained from hinged beams was higher than both bond strengths measured by the pull-out cube and pull-out prism. However, when a finite element analysis was conducted for hinged beams, it was shown that the tensile force in the reinforcing bar estimated by equilibrium conditions is overestimated as the large deformation of hinged beams at failure was not considered. Therefore, if the tensile force obtained from the finite element analysis is used to calculate the bond strength, it would be similar to that obtained from pull-out cube and prism. Moreover, it was found that the distribution of tensile and bond stresses was nonlinear along the GFRP embedment length and bond stress at the vicinity of the free end increased with increasing the load due to redistribution of bond stresses along the embedment length. Bond strengths were compared against the prediction methods provided in ACI-440.1R, CSA-S806, CSA-S6 and JSCE 1997. In general, all design codes showed conservative results for all specimens tested and ACI predictions gave a good agreement with experimental data compared to other codes. Artificial neural network models were developed to predict bond strength of GFRP bars in concrete. These models used bar diameter, embedment length, concrete compressive strength and concrete cover as input variables. The developed ANN models showed to be able to predict bond strength of GFRP bars in concrete and, therefore, were used to conduct a parametric study.
Higher Education Institute, Government of Libya
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Sandbakk, Sindre. "Fibre Reinforced Concrete : Evaluation of test methods and material development." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for konstruksjonsteknikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-15156.

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Concrete is a structural material with excellent properties when subjected to compression, butthe abilities to resist tensile stresses are rather poor. The concrete’s tensile zone is normallyreinforced with large continuous steel bars, a combination which ensures an excellentconstruction material. Placing the re-bars generates many man-hours, which means that the reinforcement work accounts for a considerable part of the total concrete cost. An alternative to the conventional re-bars is fibre reinforced concrete. Fibre reinforced concrete is concrete reinforced with small randomly distributed discontinuous fibres instead of large unidirectional continuous steel bars. In cases where thestrength and ductility of fibre reinforced concrete is sufficient with regard to the actions, fibrereinforced concrete can be an adequate and cheaper alternative to conventionally reinforced concrete. If fibres are used together with conventional re-bars, both the total load carryingcapacity and the stiffness of the structure will increase, and the crack widths will decrease. One working hypothesis in the present thesis has been that the behaviour of fibre reinforced concrete can be uniquely described by the fibre slip, and an objective has been to investigate whether this hypothesis is correct or not. Due to the fact that the maximum fibre stress achieved during pull-out test is considerably less than the fracture stress for most fibre types,it is reasonable to assume that the fibres’ pull-out length in a real structure is identical with the crack width, because the fibres will simply loosen at the weakest side of a crack. Based on alarge number of experiments, and some simplified models which relate the experimental results to crack openings, it seems like the working hypothesis is correct. A theoretical relation between the results from energy absorption test found by two differenttest codes is established. This relation is based on the above mentioned working hypothesis,and it is shown that the theoretical relation corresponds well to an empirical relation found in the literature. A second objective has been to show that fibre reinforcement actually has sufficient strength and ductility to be used as a replacement to conventional re-bars in some types of concretestructures. A concrete called ductile high tensile strength all round concrete is developed, and this concrete shows promising properties with regard to both shear strength, bending strength and ductility. The last few pages of the present thesis deals with some paradoxes from some of the material models used to describe fibre reinforced concrete from the literature. The experiences from the experimental work, and the analyses of the results, indicate that the fibre efficiency is increased by increasing crack widths until the crack widths reaches a certain level, while most of the models suggest that fibres are most effective at smaller crack widths.
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Sun, Jianan. "Peel test for the study of the fibre polymer interface." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ58749.pdf.

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Algassem, Omar. "Parameters Affecting the Blast Performance of High Strength Fibre Reinforced Concrete Beams." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/35022.

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A limited number of studies have been conducted in the literature in order to investigate the behaviour of high-strength fibre-reinforced concrete (HSFRC) structural components subjected to blast loads. This study summarizes the results of a research program investigating the potential of using steel fibres to improve the blast performance of high-strength reinforced concrete beams. As part of the experimental investigation twenty beams were tested, including nine beams tested under static four-point bending, and eleven beams tested under dynamic blast loads using a shock-tube. Parameters considered in the study include the effect of concrete strength, steel fibres, fibre content, fibre type, longitudinal reinforcement ratio, and presence of shear reinforcement. All beams in the study have identical dimensions, with a cross-section of 125 x 250 mm and length of 2440 mm. To manufacture the specimens, two beams were cast with normal-strength self-consolidate concrete (SCC), with a specified strength of 50 MPa, while the remaining beams were cast with either plain or fibre-reinforced high-strength concrete having a compressive strength which varied between 95-110 MPa. The steel fibre content in the HSFRC beams varied between 0.5 and 1.0%, by volume of concrete. To investigate the effect of reinforcement ratio (ρ), the beams were reinforced with 2-#4 (American size) bars, 2-15M bars or 2-20M bars (ρ = 1.02%, 1.59%, and 2.41%, respectively). The majority of the plain concrete beams had transverse reinforcement which consisted of 6 mm stirrups arranged at a spacing of 100 mm in the shear spans, while most of the HSFRC beams were built without stirrups. The results indicate that all the parameters in this study (reinforcement ratio, presence of stirrups, concrete strength, steel fibres, fibre content and fibre type) affected the static and blast response of the beams, however, the results demonstrate that steel fibres have a more remarkable effect when compared to the other parameters. The provision of fibres is found to improve the blast performance of the HSC beams by increasing shear capacity, reducing maximum and residual mid-span displacements, reducing blast fragments and increasing damage tolerance.
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Chan, Mimi Mingsze. "Transverse tests for fibre-polymer adhesion evaluation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0007/MQ45578.pdf.

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Zettwoch, Robert N. "FLIGHT TEST MONITORING OF AVIONIC FIBRE CHANNEL NETWORKS FOR RECORDING AND TELEMETRY." International Foundation for Telemetering, 2003. http://hdl.handle.net/10150/606696.

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International Telemetering Conference Proceedings / October 20-23, 2003 / Riviera Hotel and Convention Center, Las Vegas, Nevada
The F/A-18E/F Super Hornet fighter aircraft program is currently flight testing a Fibre Channel Network (FCN), which will initially replace certain Avionics Systems’ MIL-STD-1553 communications. The Advanced Mission Computers and Displays (AMC&D) and the Active Electronically Scanned Array (AESA) RADAR are replacing their MIL-STD-1553 counterparts to fulfill performance enhancements and growing data requirements. The maximum amount of data that can be transferred between these systems is significantly increasing. Each remote terminal on a MIL-STD-1553 bus can transmit or receive approximately 1Mbps. Each node on a FCN can simultaneously transmit and receive 1Gbps. With a Fibre Channel Network Switch (FCNS), multiple systems can communicate concurrently, thus increasing overall system throughput even further. Several other systems will be replaced in the near future utilizing the FCNS. The Fibre Channel Interface Unit (FCIU) was designed for the F/A-18E/F AESA program as a nonintrusive way to monitor multiple nodes, extract node specific information, and record this information using conventional on-board recorders. In order to reduce the risks associated with developing hardware and software concurrently with the Avionic System’s protocol, the FCIU was developed as an upper-level-protocol (ULP) (layer FC-4) independent device. Two big advantages of ULP independence are the avoidance of complex protocol programming for each different type of monitored network system and the non-intrusive nature of the FCIU connection to the FCN. This facilitates the quick installation of the FCIU to monitor any FC network and the FCIU IRIG-106 PCM type output lends itself to be integrated quickly into a typical Flight Test data recording or telemetry system.
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Tao, Yi. "Fibre reinforced polymer (FRP) strengthened masonry arch structures." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/7743.

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Masonry arch bridges have played a significant role in the road and rail transportation network in the world for centuries. They are exposed to damage due to overloading and deterioration caused by environmental actions. In order to reestablish their performance and to prevent their collapse in various hazardous conditions, many of them require strengthening. Fibre reinforced polymer (FRP) systems are increasingly used for repair and strengthening of structures, with particularly widespread application to concrete structures. However, the application of FRP composites to masonry structures is less well established due to the complexity of masonry caused by the material discontinuity. FRP strengthening masonry arch bridges has been even less studied due to the additional complexity arising from the co-existence of the normal interfacial stress and the shear interfacial stress at the curved FRP-to-masonry bondline. This thesis presents an extensive study investigating the behaviour of FRP strengthened masonry bridges. The study started with a laboratory test of a two span masonry arch bridge with sand backfill. A single ring arch bridge was first tested to near failure, and then repaired by bonding FRP into their intrados and tested to failure. It was found that the FRP strengthening not only improved the loading capacity and stiffness of bridge, but also significantly restrained the opening of cracks in the masonry. Shear and peeling debonding of FRP was observed. There have been two common strategies in finite element (FE) modelling of FRP strengthened structures in meso-scale: direct model and interface model. The former is necessary when investigating the detailed bond behaviour but challenges remain due to the difficulties in concrete modelling. A new concrete damage model based on the plastic degradation theory has been developed in this study to study the bond behaviour of FRP strengthened concrete structure. This robust model can successfully capture this bond behaviour and simulate the entire debonding process. A numerical study of masonry arch bridges including the backfill was conducted to study the behaviour of masonry arch bridge. A total of four modelling strategies were examined and compared. Although they all can successfully predict the behaviour of arch, a detailed solid model newly developed in this study is more suitable for modelling both plain masonry and FRP strengthened structures. Finally, a numerical study of bond behaviour and structural response of FRP strengthened masonry arch structures with sand backfill was conducted. In addition to the masonry and backfill, the mixed mode interfacial behaviour was modelled by the aforementioned interface model strategy and investigated in detail to achieve a deeper understanding of the behaviour of FRP strengthened masonry arch structures. The results are in close agreement with test results, and highlight the influence of the key parameters in the structural response to failure and revealed the mechanisms on how the load is transmitted through this complex multi-component structural system.
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Cámara, Vela Juan Antonio, and Molina Juan Manuel Sánchez. "Design of a Double Cantilever Beam Test Specimen and Fixture for Kink Band Formation in Unidirectional Fibre Reinforced Composites." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-11218.

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Composite materials are widely used in demanding applications in aerospace and other industries. In order to understand the complex behaviour of the composite materials and their components, standardised test methods are used. One example is the double cantilever beam (DCB) test in which the test specimen is loaded in an opening, i.e., tensile mode. Failures in composite materials loaded compression are different from those in tension, for example, kink band or buckling-like failures can occur. In this project, several DCBs are designed and a new fixture which allows for compression testing of a DCB is developed for an existing Instron testing machine. The fixture overcomes a known problem of tensile peak causing the failure of the adhesive at the inner surfaces of the DBC by applying additional compressive loads along the outer surfaces of the DBC. The compressive forces can induce the desired kink band formation so that researchers can better study the failure mode. The conceptual development of the new DCBs and the new fixture are presented. Several prototypes of the specimens and the fixture are modelled using the three-dimensional (3D) computer-aided design software Creo Parametric 2.0.  One of the fixtures is selected to further study. The different DCB specimens are studied in order to obtain information about the kink band using 3D finite element analysis with the software programme Abaqus CAE. The selected fixture is analysed to determine if there are any areas of concern. Finally, the behaviour of the compression stress along the DCB using two pairs of forces is studied. Unfortunately, it is determined that the tensile peak experienced by the adhesive cannot be eliminated by the application of two pairs of compressive loads, one at the free end and the other in the vicinity of the tensile peak. Several suggestions are made for future work which might serve to reduce the tensile peak; e.g., the movable force couple is applied as a surface load instead of a point load. For this, the fixture will have to be modified with a new geometry, although the DCB could be the same. This will allow further work to focus on the combined behaviour of the tensile peak and the fixture.
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Books on the topic "Fibro Test"

1

R, Schnell Eugene, ed. FIRO-B Technical Guide. Mountain View, California, USA: Consulting Psychologists Press, 2000.

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Schutz, Will. FIRO: A three-dimensional theory of interpersonal behavior. 3rd ed. Muir Beach, CA: WSA [Will Schutz Associates], 1998.

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Waterman, Judith A. Introduction to the FIROB. Palo Alto, CA: Consulting Psychologists Press, 1996.

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Ryan, Leo Robert. Clinical interpretation of the FIRO-B. 3rd ed. Palo Alto, CA (3803 E. Bayshore Rd., Palo Alto 94303): Consulting Psychologists Press, 1989.

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Chan, Mimi Mingsze. Transverse tests for fibre=polymer adhesion evaluation. Ottawa: National Library of Canada, 1998.

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Schnell, Eugene R. Introduction to the FIRO-B instrument in organisations. Mountain View, CA: CPP, 2004.

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Sun, Jianan. Peel test for the study of the fibre polymer interface. Ottawa: National Library of Canada, 2001.

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Schnell, Eugene R. Participating in teams: Using your FIRO-B results to improve interpersonal effectiveness. Palo Alto, Calif. (3803 E. Bayshore Rd., Palo Alto 94303): Consulting Psychologists Press, 2000.

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Chen, Li Che Ted. A unique method of determining the elastic and engineering constants of unidirectional fibre-reinforced composite plates using ultrasound. [Downsview, Ont.]: Department of Aerospace Science and Engineering, University of Toronto, 1990.

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Chen, Li Che Ted. A unique method of determining the elastic and engineering constants of unidirectional fibre-reinforced composite plates using ultrasound. Ottawa: National Library of Canada = Bibliothèque nationale du Canada, 1991.

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Book chapters on the topic "Fibro Test"

1

Joffe, Roberts, and Janis Varna. "Fibre/Matrix Interface Fracture Toughness Identification in Single Fibre Fragmentation Test." In Material Identification Using Mixed Numerical Experimental Methods, 239. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-1471-1_28.

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Vivas, Juan Carlos, Facundo Isla, María Celeste Torrijos, Graciela M. Giaccio, Bibiana Luccioni, and Raúl L. Zerbino. "Drop-Weight Impact Test for Fibre Reinforced Concrete: Analysis of Test Configuration." In RILEM Bookseries, 61–73. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-83719-8_6.

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Fujita, Masami, Terumitsu Takahashi, Kazuhiro Kuzume, Tamon Ueda, and Akira Kobayashi. "Strengthening with Prestressed CFRP Strips of Box Girders on the Chofu Bridge, Japan." In Case Studies of Rehabilitation, Repair, Retrofitting, and Strengthening of Structures, 21–34. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2010. http://dx.doi.org/10.2749/sed012.021.

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<p>Reinforced concrete (RC) box girders of the Chofu Bridge had been strengthened using tensioned carbon fibre reinforced polymer (CFRP) strip method. Before and after the CFRP application, on-site load tests of the bridge were conducted using a 45 t weight vehicle.</p>
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Llano-Torre, Aitor, and Pedro Serna. "Fibre Reinforced Concrete Characterization." In Round-Robin Test on Creep Behaviour in Cracked Sections of FRC: Experimental Program, Results and Database Analysis, 19–29. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-72736-9_3.

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Guofan, Zhao, and Huang Chengkui. "Test Method and Application of Steel Fibre Reinforced Concrete." In Brittle Matrix Composites 2, 629–38. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2544-1_66.

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Fardi, F., N. Mitchell, and R. Poehlchen. "Comparison of Test Results with Analysis of Glass Fibre Reinforced Epoxy Shear Test Samples." In 11th International Conference on Magnet Technology (MT-11), 719–24. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0769-0_124.

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Kikuchi, H., K. Matsui, and M. Morio. "Diagnosis of Malignant Hyperthermia in Japan by the Skinned Fibre Test." In Malignant Hyperthermia, 279–94. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4613-2079-1_11.

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Reggia, Adriano, Fausto Minelli, and Giovanni A. Plizzari. "Suitable Restrained Shrinkage Test for Fibre Reinforced Concrete: A Critical Discussion." In 7th RILEM International Conference on Cracking in Pavements, 615–24. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4566-7_60.

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Look, Katharina, Peter Heek, and Peter Mark. "Direct Tensile Tests of Supercritical Steel Fibre Reinforced Concrete." In RILEM Bookseries, 132–42. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-83719-8_12.

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Karcagi, Rita, and János Lukács. "Fatigue Crack Growth Tests on Carbon Fibre Reinforced Aluminium Matrix Composites." In Materials Science, Testing and Informatics II, 111–16. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-957-1.111.

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Conference papers on the topic "Fibro Test"

1

Zubair, Iram, and Bilal Wajid. "Comparison of APRI, FIB-4 and fibro test in prediction of fibrosis and cirrhosis in patients with hepatitis C." In 2018 15th International Bhurban Conference on Applied Sciences and Technology (IBCAST). IEEE, 2018. http://dx.doi.org/10.1109/ibcast.2018.8312227.

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Zanela, Eduardo Henrique Rocha, and Cesar Augusto Cavalheiro Marcondes. "Teste de desempenho de Algoritmo de Controle de Congestionamento TCP utilizando testbed FIBRE." In III Workshop do Testbed FIBRE. Sociedade Brasileira de Computação - SBC, 2018. http://dx.doi.org/10.5753/fibre.2018.3132.

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O controle de congestionamento do TCP é fundamental para manter um bom funcionamento e desempenho de uma rede de internet, pois controla a taxa de transmissão realizada pelos emissores, evitando ou reduzindo ocasiões de congestionamento. Apesar de diversos estudos realizarem testes entre diferentes TCP's, não existe um protocolo genérico ideal, mas sim protocolos que funcionam melhor em determinadas situações. Winstein e Balakrishan (2013) apresentaram no SIGCOMM1 um programa capaz de gerar algoritmos de controle de congestionamento para serem executados nos pontos finais da rede, o programa Remy. Os resultados apresentados no artigo, através de testes comparativos realizados pelo programa Network Simulation (NS2), demonstraram um funcionamento bastante superior aos protocolos atuais. Porém para a criação de novos algoritmos com diferentes cenários, o Remy requer um alto custo computacional, e ainda sim é necessário uma grande quantidade de dias para sua execução completa. Para a resolução desta problemática, criar uma versão suavizada do Remy permite minimizar o tempo de processamento e o custo computacional. Buscando facilitar o teste de desempenho e visando um teste em rede real, a utilização de uma testbed FIBRE se encaixa perfeitamente no cenário.
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Sayède, Frédéric, Isabelle Guinouard, Gilles Fasola, Emilie Lhome, Jean-Philippe Amans, Piercarlo Bonifacio, Don Carlos Abrams, et al. "WEAVE MOS fibre bundle test plan." In SPIE Astronomical Telescopes + Instrumentation, edited by Ramón Navarro, Colin R. Cunningham, and Allison A. Barto. SPIE, 2014. http://dx.doi.org/10.1117/12.2056285.

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West, R. H. "Interpreting Radiation Tests On Fibre Optics." In Fibre Optics '87, edited by Lionel R. Baker. SPIE, 1987. http://dx.doi.org/10.1117/12.938010.

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Amal, R., J. Narendra, M. Sivakumar, and M. V. L. R. Anjaneyulu. "Performance Evaluation of Cold Bituminous Mix Reinforced with Coir Fibre." In International Web Conference in Civil Engineering for a Sustainable Planet. AIJR Publisher, 2021. http://dx.doi.org/10.21467/proceedings.112.67.

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Cold bituminous mix (CBM), which is a mixture of bitumen emulsion and aggregate that is mixed together at ambient temperature, has several advantages like energy savings, easiness in preparation, environmental benefits, and high production at low investment. But there are certain limitations of CBMs like inferior mechanical properties, high air voids, weak early life strength, long curing time and poor coating that hinder its extensive usage. The possibility of improving mechanical performance of CBMs by the addition of coir fibre is attempted in this study. The objectives of the study are to assess the improvement in performance of CBM due to addition of coir fibre and to identify the optimum length and optimum content of coir fibre for CBMs. Three coir fibre contents and three coir fibre lengths were used in this study. Performance evaluation of CBM modified with coir fibre was done through Retained Marshall Stability (RMS) test and Hamburg wheel tracking test. Coir fibre was added to the aggregates and mixed before the addition of pre-wetting water and emulsion, to achieve uniform distribution and to avoid balling of coir fibres. When coir fibre was added to the mix, Marshall Stability increased up to a certain level of coir fibre content depending on fibre length. Highest Marshall Stability value was obtained at 0.2% content (by weight of total mix) of coir fibre of 15 mm length. Resistance to moisture damage was assessed by RMS test. It was observed that the addition of coir fibre improved the RMS value. From the Hamburg wheel tracking test, it was observed that the addition of coir fibre improved rut resistance. For all fibre lengths, CBM with 0.2 % coir content showed the highest rut resistance, with 10 mm fibre length showed the best performance. Hence, coir fibre is recommended as a feasible additive for mechanical performance improvement of CBMs.
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Wasilewski, P., and M. Kuciej. "COMPARATIVE STUDY ON THE EFFECT OF FIBRE SUBSTITUTION ON THE PROPERTIES OF COMPOSITE RAILWAY BRAKE SHOE." In BALTTRIB. Aleksandras Stulginskis University, 2017. http://dx.doi.org/10.15544/balttrib.2017.31.

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During the design process, railway friction materials are subject to extensive testing which allows for a thorough assessment of their compliance with versatile requirements and expected characteristics. These tests include, among other, laboratory tests of mechanical, physicochemical, thermophysical and tribological properties. For a designer it is crucial to understand how formulation modification influences characteristics of the friction material. One of the key ingredients in the formulation of friction materials is reinforcing fibre. In this study, two composite, organic railway brake shoes with equal amount of two different reinforcing fibres, namely steel wool and glass fibre, were tested according to the procedures of a railway friction materials manufacturer. Test results were analysed and compared. The substitution of reinforcing fibre had a noticeable effect on each of the properties of the composites considered in this study.
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Trindade, Yan, Luiz Henrique Calixto de Souza, Lucas C. Jorge, Andre G. Damaceno, and Jacir L. Bordim. "Desenvolvimento de Aplicação IoT utilizando a Plataforma Integrada Softway4IoT e Fiware." In Workshop do Testbed FIBRE. Sociedade Brasileira de Computação, 2021. http://dx.doi.org/10.5753/fibre.2021.15769.

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A Internet das Coisas (IoT) abrange uma diversidade de dispositivos, incluindo sensores e atuadores com funcionalidades, capacidades e características bastante distintas. A heterogeneidade dos dispositivos IoT requer mecanismos adequados de gestão, coleta e disponibilização de dados. Neste contexto, o presente trabalho tem como objetivo avaliar duas plataformas que se complementam no gerenciamento de dispositos IoT. Para tal, este trabalho apresenta uma aplicação que utiliza API's genéricas e reusáveis da plataforma Fiware com o poder de gerenciamento de múltiplos sensores da plataforma Softway4IoT para abstrair os diferentes protocolos de comunicação no desenvolvimento de uma aplicação de teste.
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Jülich, F., A. W. Koch, and J. Roths. "1.3 - Fibre-Bragg-Gratings in Highly Birefringent Optical Fibres for Advanced FBG Sensing Applications." In SENSOR+TEST Conferences 2011. AMA Service GmbH, Von-Münchhausen-Str. 49, 31515 Wunstorf, Germany, 2011. http://dx.doi.org/10.5162/opto11/o1.3.

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Vitt, G. "Steel fibre concrete industrial floors." In International RILEM Workshop on Test and Design Methods for Steelfibre Reinforced Concrete. RILEM Publications SARL, 2003. http://dx.doi.org/10.1617/2351580168.014.

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Bohnert, Klaus M., H. Braendle, and G. Frosio. "Field test of interferometric optical fiber high-voltage and current sensors." In 10th Optical Fibre Sensors Conference. SPIE, 1994. http://dx.doi.org/10.1117/12.185032.

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Reports on the topic "Fibro Test"

1

Jones, Sid. Next Generation Instrumentation Bus Test Plan for Fibre Channel. Fort Belvoir, VA: Defense Technical Information Center, September 1999. http://dx.doi.org/10.21236/ada376558.

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Niebler, Rebecca. Abfallwirtschaftliche Geschäftsmodelle für Textilien in der Circular Economy. Sonderforschungsgruppe Institutionenanalyse, September 2020. http://dx.doi.org/10.46850/sofia.9783941627833.

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This master thesis explores the challenges for waste management business models in the field of textiles regarding the requirements of the circular economy, as well as improvement potentials in the current framework conditions. It is concerned with the research question: "Is it advisable to change the frame-work conditions at meso or macro level, with regard to business models for waste management companies in the textile sector that are oriented towards the requirements of the circular economy, and - if so - in what way?” The approach of the study is based on the delta analysis of the e Society for Institutional Analysis at the Darmstadt University of Applied Sciences. It compares the target state of the normative requirements with the actual state of the textile and waste management framework conditions and attempts to identify the gaps (the delta). Based on the delta, it develops approaches that are intended to help reduce the gaps. The thesis develops three business models for the target year 2025 in different areas: an exchange platform for sorters, recyclers and designers, an automatic sorting plant and a plant for fibre-to-fibre recycling of mixed materials. It is becoming clear that these business models cannot meet the target requirements for the circular economy. The analysis identifies the remaining gaps in the framework conditions as the main problem. For example, insufficient innovation impulses and the lack of competitiveness of secondary raw materials inhibit the actors from applying and using new technologies and business models. Restricted access to knowledge and information, as well as a lack of transparency between the actors, also prove to be problematic. In order to answer the research question, the study recommends altering the framework conditions at meso and macro level. It proposes a platform for cooperation between designers, the introduction of a material declaration system and an eco-design guideline for textiles as possible development options. In addition, this work offers a matrix of criteria to help the actors test and improve their new waste management business models regarding their suitability for the circular economy. The analysis is carried out from an outsider's perspective on the entire textile industry. It therefore cannot cover and deal with all aspects and individual circumstances of each player in detail. The necessary changes in the framework conditions that have been identified can therefore be used as a basis for further investigations.
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