Academic literature on the topic 'Lining destruction'
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Journal articles on the topic "Lining destruction"
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Richter, E. E. "Improvement of the switch counter-rail lining design." Herald of the Ural State University of Railway Transport, no. 2 (2021): 14–20. http://dx.doi.org/10.20291/2079-0392-2021-2-14-20.
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The element of the upper structure of the railway track - the switch counter-rail lining is studied. A variant of the serial design of the PKZhDL-65-4 counter-rail lining is considered. The analysis of the failure rate of counter-rail linings is carried out, and the results of observations of the condition of the linings in different regions are presented. The destruction zone is localized and its character as a multi-cycle fatigue destruction is determined. The information about the conducted complex of experimental studies for investigation of the stress-strain state in the dangerous zone of the lining is presented. To carry out the design studies, the design schemes of the counter-rail lining were developed. Calculated studies of the influence of various factors on the level of stresses acting in the hazardous area of the structure are performed. The influence of the type of the design scheme, the stiffness of the rubber shock-absorbing lining and the properties of the sleeper material is studied. Variants of counter-rail lining designs for reducing the level of stresses acting in the dangerous zone are proposed. Computational studies were conducted to optimize the proposed lining options in order to reduce material consumption. The results of testing of new lining structures on the switches of the South Ural Railway are presented. The information about the conducted complex of experimental studies for investigation of the stress-strain state in the dangerous zone of the lining is presented. To carry out the design studies, the design schemes of the counter-rail lining were developed. Calculated studies of the influence of various factors on the level of stresses acting in the hazardous area of the structure are performed. The influence of the type of the design scheme, the stiffness of the rubber shock-absorbing lining and the properties of the sleeper material is studied. Variants of counter-rail lining designs for reducing the level of stresses acting in the dangerous zone are proposed. Computational studies were conducted to optimize the proposed lining options in order to reduce material consumption. The results of testing of new lining structures on the switches of the South Ural Railway are presented.
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Crudu, Ion, Mircea-Petre Ionescu, Viorel Munteanu, Ion-Florentin Sandu, and Paraschiv Nedelcu. "A tribosystemic approach to refractory lining destruction in blast furnaces." Wear 216, no. 2 (April 1998): 251–61. http://dx.doi.org/10.1016/s0043-1648(98)00179-3.
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Zhang, X., J. D. Ma, J. Jing, J. Wang, T. Wu, D. Zheng, and L. Dai. "AB0054 SYNOVIAL CD163+ MACROPHAGES ARE ASSOCIATED WITH RADIOGRAPHIC JOINT DESTRUCTION IN RHEUMATOID ARTHRITIS." Annals of the Rheumatic Diseases 79, Suppl 1 (June 2020): 1329.1–1329. http://dx.doi.org/10.1136/annrheumdis-2020-eular.1141.
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Background:CD163, a hemoglobin scavenger receptor, has been identified as a marker of M2 macrophages, it can promote the release of IL-10 and carbon oxide. Researches on inflammatory diseases and tumors have suggested that CD163 plays anti-inflammatory effect and promotes tumor growth and metastasis. Rheumatoid arthritis (RA) is a chronic inflammatory disease characterized by chronic synovitis with inflammatory cells infiltration including considerable macrophages. However, little is known about the role of CD163+ macrophages in RA synovium.Objectives:To investigate the expression and clinical significance of synovial CD163+ macrophages in RA.Methods:Seventy-five RA patients were recruited and clinical data including disease activity, HAQ and Sharp/van der Heijde-modified Sharp score of bilateral hands and wrists were collected. Synovial tissues were obtained by needle biopsies or arthroscopy of knee joints. Eighteen osteoarthritis (OA) and seventeen orthopedic arthropathies (orth.A) patients were included as controls. All synovium were stained with H&E and immunohistochemically for CD163, CD3, CD20, CD38, CD68, and CD15. Histologic changes of synovitis in H&E stained sections were graded with Krenn’s synovitis score.Results:Positive CD163 expression were found in both lining synoviocytes and sublining inflammatory cells. Both densities of lining and sublining CD163+ macrophages in RA synovium were significantly higher than that in OA or Orth.A synovium (140.47±66.93 vs. 17.85±7.70 vs. 19.76±5.26 and 417.92±249.62 vs. 27.58±14.19 vs. 29.87±9.33, allP<0.001, Figure 1).According to Krenn’s synovitis score, there were 68% RA patients showing high synovitis (score>4). Both lining and sublining synovial CD163+ macrophages were significantly higher than those showing low synovitis (lining: 158.40±62.91 vs. 122.06±66.74, sublining: 462.96±62.91 vs. 371.65±271.54, bothP<0.05). Meanwhile, the densities of lining and sublining CD163+ macrophages were both positively correlated with Krenn’s synovitis score (r=0.238 and 0.343, bothP<0.05).For clinical relationship in RA, the density of sublining CD163+ macrophages was positively correlated with total Sharp score (mTSS) (r=0.399,P<0.001), joint space narrowing subscore (r=0.248,P=0.032) and joint erosion subscore (r=0.457,P<0.001). While the density of lining CD163+ macrophages was positively correlated with mTSS (r=0.319,P=0.005) and joint erosion subscore (r=0.358,P=0.002). Meanwhile, the densities of sublining and lining CD68+ macrophages were also positively correlated with mTSS (r=0.253 and 0.242, bothP<0.05), of which the correlation was weaker than that of CD163+ macrophages (Figure 2). There were no significant correlation between the density of CD163+ macrophages and disease activity or HAQ (allP>0.05).Conclusion:Synovial CD163+ macrophages are associated with radiographic joint destruction, which imply that CD163+ macrophages may play role in the pathogenisis of joint destruction in RA.Figure 1.Representative immunohistochemical findings of synovial CD163 expression. (A) Synovial CD163 expression in an Orth.A patient, an OA patient and a RA patient. (B) Densities of lining and sublining CD163+ macrophages in Orth.A, OA and RA patients.Figure 2.Spearman’s rank correlation analysis for synovial macrophages and mTSS in RA. (A) Correlation between sublining CD163+ macrophages and mTSS, joint space narrowing subscore, joint erosion subscore. (B) Correlation between lining CD163+ macrophages and mTSS, joint space narrowing subscore, joint erosion subscore.Funding: :This work was supported by National Natural Science Foundation of China (no. 81801606 and 81971527), Guangdong Natural Science Foundation (no. 2017A030313576, 2018A030313541 and 2019A1515011928).Figures:Disclosure of Interests:None declared
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Zavertkin, A. S. "Effect of heat treatment of quartzite on the mechanism of destruction of the lining of induction furnaces." NOVYE OGNEUPORY (NEW REFRACTORIES), no. 1 (April 26, 2019): 49–53. http://dx.doi.org/10.17073/1683-4518-2019-1-49-53.
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The mechanism of wear of quartzite lining of induction crucible furnaces during the smelting of iron and steel is presented. It has been established that the main cause of lining wear is a decrease in its strength caused by the transition of the tridimite joint into cristobalite, which is much easier to wash off the walls of the crucible with moving metal and slag. The second important factor of wear is the choice of quartzite raw materials, its material and granulometric compositions, the firing mode and the technology of melting during operation of the furnace. Silicon recovery from silica of carbonization lining by carburizer and cast iron, which is part of, is a secondary factor of crucible lining wear. Ill. 4. Ref. 5. Tab. 1.
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Suvorov, S. A., A. P. Shevchik, V. V. Kozlov, and N. V. Arbuzova. "Suppression of decarbonization and resource characteristics of carbonated spinel-corundum refractories in steel-ladle lining." NOVYE OGNEUPORY (NEW REFRACTORIES), no. 5 (November 26, 2021): 104–12. http://dx.doi.org/10.17073/1683-4518-2021-5-104-112.
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Experimental studies of changes in the pore structure and physical and technical properties of carbonated spinel-corundum refractories under different conditions of decarbonization and the formation of a protective regulatory layer on their hot surface, suppressing decarbonization of the refractory material and mass transfer between the lining and the flow of slag melt, are presented. The results of industrial tests of carbonated spinel-corundum refractories in the working layer of the lining of a 400-ton steel-ladle lining, as well as the topography and consumption specific coefficients of refractories for the functional zones of the ladle lining, the amount of refractory destruction products of the lining during its operation are considered.
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Lonzinger, Tatiana M., Vadim A. Skotnikov, and Alexey M. Sukharev. "Study of the Influence of Refractories Structure on the Thermomechanical Properties of Tunnel Kiln Equipment Lining." Solid State Phenomena 299 (January 2020): 150–56. http://dx.doi.org/10.4028/www.scientific.net/ssp.299.150.
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A study of the influence of refractories’ structure on the thermomechanical properties of the lining of the equipment of tunnel kilns has been carried out. The lining of kiln trolleys is subjected to a mechanical stress distributed evenly over the entire area and the most dangerous to brittle materials, as well as to tensile thermal stresses. The magnitude of the tensile thermal stress depends on the material and the structure of the lining. The mechanisms of destruction of products made of fireclay and liquid concrete have been studied. Mineralogical and petrographic analysis of fireclay refractories have been used, as trolley lining has established metasomatic interaction of the lining with the vapor-gas component of the kiln, as well as with the metal of the trolleys. Monolithic products, made of low-cement concrete with corundum filler, are characterized by high strength and resistance to abrasion. The total value of compression and thermal expansion stresses for them is 3.08 MPa, which is half the value of those of fireclay. When conducting the research to optimize the composition of trolley lining, a technology for manufacturing two-layer concrete blocks, combining the advantages of compositions, based on corundum and fireclay, has been developed. The chemical and granulometric composition of fireclay-based concrete in the lower thermal insulation layer and electrocorundum-based concrete in the upper reinforcing layer were selected in such a way, as to ensure similar values of linear thermal expansion coefficients and prevent possible destruction along the boundary between the layers during the operation.
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Акатьев, Владимир, Vladimir Akatev, Л. Волкова, L. Volkova, М. Тюрин, M. Tyurin, Е. Бородина, and E. Borodina. "Taking into Account the Initial Signs of Critical Degradation of a Chimney in the Analysis of the Risk of Its Destruction." Safety in Technosphere 7, no. 4 (June 24, 2019): 11–16. http://dx.doi.org/10.12737/article_5cf6646e9e17c2.03590798.
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The analysis of the dynamics of the corrosion processes of the lining and concrete trunk of the chimney, depending on the operating conditions and climatic conditions, reveals the conditions for the formation of initial cracks in the lining, the dynamics of their growth, it is shown that, with a density of hair cracks of 10 pieces on an area of 0.5 m2, so permeable that the rates of local corrosion processes of lining and concrete materials create an excessive risk of destruction of the chimney. Especially quickly the degradation processes the chimney is exposed at a point about one-third of the top at gas velocities below 10 and above 20 m/s. Excessive permeability of the lining as an additional critical defect is suggested to be taken into account in the composition of critical defects in the traditional classification of their hazards, and its identification is to be based on the results of recognition of defects in photographs obtained by monitoring the chimney with an autonomous device — by the parameter “exceeding the density of cracks by opening width 1 mm and more than 10 pieces on an area of 0.5 m2. At the same time, in the analysis of the risk of destruction of the chimney, the event tree is complemented by the fourth branch, which means the emergence of a critical defect — excessive permeability of gases through the lining. In addition, the lengths of cracks in the lining and concrete trunk are referred to the diameter of the pipe, which makes the classification more universal.
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Cao, Xiao Ping. "Research on the Earthquake Dynamic Responses of Tunnel under Changing Tunnel Lining Rigidity." Advanced Materials Research 250-253 (May 2011): 1978–82. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.1978.
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With the increasing of the quantity of the tunnel, more and more attentions have been paid to the tunnel destruction induced by earthquake. Based on the software of finite element, the finite element model for deeply buried tunnel have been set up; and the responses about different rigidity of tunnel lining under seismic dynamic load has been analyzed by using elastic finite element theory. The conclusions have been drawn that the change of seismic responses by increasing rigidity of tunnel lining is unobvious, and the method using increasing rigidity of tunnel lining to reduce the seismic responses of tunnel is uneconomical.
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Belyakov, Nikita, Olga Smirnova, Aleksandr Alekseev, and Hongbo Tan. "Numerical Simulation of the Mechanical Behavior of Fiber-Reinforced Cement Composites Subjected Dynamic Loading." Applied Sciences 11, no. 3 (January 26, 2021): 1112. http://dx.doi.org/10.3390/app11031112.
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The problem of damage accumulation in fiber-reinforced concrete to structures supporting underground workings and tunnel linings against dynamic loading is insufficiently studied. The mechanical properties were determined and the mechanism of destruction of fiber-reinforced concrete with different reinforcement parameters is described. The parameters of the Concrete Damaged Plasticity model for fiber-reinforced concrete at different reinforcement properties are based on the results of lab experiments. Numerical simulation of the composite concrete was performed in the Simulia Abaqus software package (Dassault Systemes, Vélizy-Villacoublay, France). Modeling of tunnel lining based on fiber-reinforced concrete was performed under seismic loading.
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KOTKOVA, O. N. "SAFETY MONITORING OF SMOKE STACKS PETROCHEMICAL COMPANY." Urban construction and architecture 3, no. 3 (September 15, 2013): 81–84. http://dx.doi.org/10.17673/vestnik.2013.03.16.
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Industrial chimneys exposed to corrosive gases and temperatures frequently occur following injury - is the destruction of masonry lining and branching from the vertical. Monitoring the state of industrial structures allows to detect violations that occur in structures during the operation and can quickly deal with them.
Dissertations / Theses on the topic "Lining destruction"
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Ahuja, Vishwajeet. "Non-destructive approach for sprayed concrete lining strength monitoring." Thesis, University of Warwick, 2017. http://wrap.warwick.ac.uk/103087/.
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Sprayed concrete lining (SCL) is an important part of soft ground tunnelling. It provides immediate ground support and maintains tunnel stability. A quick set and rapid strength development of freshly sprayed concrete are crucial for maintaining SCL integrity. An inadequate strength development leads to the SCL failure and tunnel instability. This poses serious health and safety risks to construction workers and nearby structures. Therefore, early age strength development monitoring forms a crucial aspect of SCL construction. Currently used testing methods, namely needle penetrometer, stud-driving and uniaxial compressive testing of cored samples, are of destructive nature. To avoid damage to the freshly sprayed lining and to mitigate safety hazards to testing operatives, testing is performed on test panels. Current test methods, however, test a very small part of the sprayed concrete. Since the temperature histories of the lining section are different from the test panels, the outcomes are local in nature and provide an incomplete picture of the SCL strength gain. Thus, there remains a need for a test method with a capability of testing large volumes of the sprayed concrete works remotely, holistically and non- destructively. The maturity method is well established for normal concretes and allows maturity and hence strength to be calculated from a temperature history. A new method called Strength Monitoring Using Thermal Imaging seeks to apply this principle to accelerated sprayed concrete using an Arrhenius equation based maturity function, but there are significant challenges to overcome to obtain the input parameters. This research establishes a thermo-chemo-mechanical evaluation methodology for obtaining the input parameters and verifies its reliability through two detailed case studies on live tunnelling projects. The two-staged methodology involved thermo-chemical evaluation of a total of twelve cement pastes, through isothermal calorimetry and thermogravimetry, and thermo-mechanical evaluation of two sprayed concrete mixes, through strength testing and thermal imaging of more than fifty test panels. The thermo-chemical evaluation revealed that the sprayed concrete has very different hydration kinetics at different temperatures and the reference temperature approach is not valid for the maturity assessments. The maturity modelling procedure was modified to account for kinetics variability. The thermo-mechanical evaluation revealed that sprayed concrete holds a multilinear strength – maturity relationship as against a single linear relationship for plain concrete.
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Білянін, Роман Володимирович. "Тепловий контроль технічного стану індукційних установок для виробництва мідної катанки." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2019. http://repository.kpi.kharkov.ua/handle/KhPI-Press/41338.
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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.11.13 – прилади і методи контролю та визначення складу речовин. – Національний технічний університет "Харківський політехнічний інститут", м. Харків, 2019 р.
У дисертації вирішено важливе наукове завдання розвитку методів теплового контролю технічного стану індукційних установок виробництва високоякісної мідної катанки на основі використання математичного моделювання електротеплових процесів, аналізу розподілу температури в багатошаровій термоізоляції установок з урахуванням її деградації та розподілу температури на їх поверхні, що має суттєве значення для розвитку кабельної промисловості. Розроблено новий метод неруйнівного контролю технічного стану індукційних установок для виготовлення мідної катанки енергетичного призначення, в якому крім вимірювання реактивного та активного опорів індуктора та різниці температури води у системі охолодження додатково визначається ступінь деградації багато-шарової термоізоляції шляхом порівняння розрахункового розподілу поточної температури в об'ємі розплаву та ізоляції на тривимірній математичній моделі установки з практичним вимірюванням температури локальних областей (у роботі їх було 72) поверхні корпусу печі. Це дає можливість точніше прогнозувати ресурс печі та завчасно виявляти режими її роботи близькі до аварійних. Розроблено нове технічне рішення з удосконалення багатошарової термоізоляції індукційних установок з метою зменшення їхніх енерговитрат і збільшення ресурсу. Воно полягає у застосуванні замість третього термоізоляційного шару з легковагої цегли трьох шарів: монолітного вогнетривкого бетону, легковагої цегли та вогнетривкого паперу, зі збереженням загальної товщини ізоляції. Впровадження результатів дисертації в індукційній установці UPCAST US20X-10 для виготовлення мідної катанки в ПАТ "ЗАВОД ПІВДЕНКАБЕЛЬ" дало позитивні результати у зниженні на 20°C температури на корпусі печі, скороченні на 5-15% питомої витрати електроенергії на 1 тонну катанки та поліпшенні її якості шляхом зменшення відсотку сторонніх домішок і забезпечення вмісту в ній міді 99,99%.The thesis for a Candidate of Engineering Sciences degree by specialty 05.11.13 – devices and methods of control and determination of composition of substances. – National technical university "Kharkov polytechnic institute", Kharkiv, 2019. The thesis solves the important scientific task to improve methods of control of the technical condition of induction installations for the production of high-quality copper rod using the mathematical modeling of electrothermal processes in copper melt and multi-layer thermal insulation, with taking into account its degradation and temperature distribution on the installation surface, which is essential for the development of cable industry. A new method of non-destructive control of the technical condition of induction installations for the production of copper rod for power cables of energy value is developed, in which in addition to measuring the reactive and active resistances of the inductor and the reduction of the water temperature in the cooling system, the degree of degradation of multilayer thermal insulation is additionally determined by comparing the calculated distribution of the current temperature in the volume of melt and insulation on a three-dimensional mathematical model of the installation with practical measurement of temperature in local areas (in the work they were 72) of the surface of the furnace casing. This makes it possible to more accurately predict the furnace's profile and to detect the modes of its operation in a timely manner close to the emergency. A new technical solution for improving the multilayer thermoinsulation of induction installations has been developed in order to reduce their energy consumption and increase the resource. It consists in applying instead of the third thermal insulation layer of light-weight brick of three layers: monolithic refractory concrete, lightweight brick and refractory paper, with the preservation of the overall thickness of the insulation. The implementa-tion of the developed lining structure improvement at PJSC " YUZHCABLE WORKS" in the UPCAST US20X-10 induction installation for copper rod in the cable industry in Ukraine has yielded positive results in a 20°C decrease in the temperature of the furnace casing, a reduction of 5-15% of the specific cost Electricity for 1 ton of production and improvement of quality of copper rod, by reducing the percentage of foreign impurities and ensuring copper content in it 99,99%.
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Білянін, Роман Володимирович. "Тепловий контроль технічного стану індукційних установок для виробництва мідної катанки." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2019. http://repository.kpi.kharkov.ua/handle/KhPI-Press/41340.
Full textAbstract:
Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.11.13 – прилади і методи контролю та визначення складу речовин. – Національний технічний університет "Харківський політехнічний інститут", м. Харків, 2019 р.
У дисертації вирішено важливе наукове завдання розвитку методів теплового контролю технічного стану індукційних установок виробництва високоякісної мідної катанки на основі використання математичного моделювання електротеплових процесів, аналізу розподілу температури в багатошаровій термоізоляції установок з урахуванням її деградації та розподілу температури на їх поверхні, що має суттєве значення для розвитку кабельної промисловості. Розроблено новий метод неруйнівного контролю технічного стану індукційних установок для виготовлення мідної катанки енергетичного призначення, в якому крім вимірювання реактивного та активного опорів індуктора та різниці температури води у системі охолодження додатково визначається ступінь деградації багато-шарової термоізоляції шляхом порівняння розрахункового розподілу поточної температури в об'ємі розплаву та ізоляції на тривимірній математичній моделі установки з практичним вимірюванням температури локальних областей (у роботі їх було 72) поверхні корпусу печі. Це дає можливість точніше прогнозувати ресурс печі та завчасно виявляти режими її роботи близькі до аварійних. Розроблено нове технічне рішення з удосконалення багатошарової термоізоляції індукційних установок з метою зменшення їхніх енерговитрат і збільшення ресурсу. Воно полягає у застосуванні замість третього термоізоляційного шару з легковагої цегли трьох шарів: монолітного вогнетривкого бетону, легковагої цегли та вогнетривкого паперу, зі збереженням загальної товщини ізоляції. Впровадження результатів дисертації в індукційній установці UPCAST US20X-10 для виготовлення мідної катанки в ПАТ "ЗАВОД ПІВДЕНКАБЕЛЬ" дало позитивні результати у зниженні на 20°C температури на корпусі печі, скороченні на 5-15% питомої витрати електроенергії на 1 тонну катанки та поліпшенні її якості шляхом зменшення відсотку сторонніх домішок і забезпечення вмісту в ній міді 99,99%.The thesis for a Candidate of Engineering Sciences degree by specialty 05.11.13 – devices and methods of control and determination of composition of substances. – National technical university "Kharkov polytechnic institute", Kharkiv, 2019. The thesis solves the important scientific task to improve methods of control of the technical condition of induction installations for the production of high-quality copper rod using the mathematical modeling of electrothermal processes in copper melt and multi-layer thermal insulation, with taking into account its degradation and temperature distribution on the installation surface, which is essential for the development of cable industry. A new method of non-destructive control of the technical condition of induction installations for the production of copper rod for power cables of energy value is developed, in which in addition to measuring the reactive and active resistances of the inductor and the reduction of the water temperature in the cooling system, the degree of degradation of multilayer thermal insulation is additionally determined by comparing the calculated distribution of the current temperature in the volume of melt and insulation on a three-dimensional mathematical model of the installation with practical measurement of temperature in local areas (in the work they were 72) of the surface of the furnace casing. This makes it possible to more accurately predict the furnace's profile and to detect the modes of its operation in a timely manner close to the emergency. A new technical solution for improving the multilayer thermoinsulation of induction installations has been developed in order to reduce their energy consumption and increase the resource. It consists in applying instead of the third thermal insulation layer of light-weight brick of three layers: monolithic refractory concrete, lightweight brick and refractory paper, with the preservation of the overall thickness of the insulation. The implementa-tion of the developed lining structure improvement at PJSC " YUZHCABLE WORKS" in the UPCAST US20X-10 induction installation for copper rod in the cable industry in Ukraine has yielded positive results in a 20°C decrease in the temperature of the furnace casing, a reduction of 5-15% of the specific cost Electricity for 1 ton of production and improvement of quality of copper rod, by reducing the percentage of foreign impurities and ensuring copper content in it 99,99%.
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Gauthier, Camille. "Analyse acoustique et physico-chimique du couplage de solides élastiques : étude de l'adhésion dans les collages structuraux." Thesis, Le Havre, 2016. http://www.theses.fr/2016LEHA0018/document.
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Cette thèse s’inscrit dans le contexte de l’ANR ISABEAU (Innovating for Structural Adhesive Bonding Evaluation and Analysis with Ultrasounds, associant des physico-chimistes et des acousticiens) et cherche à apporter des connaissances nouvelles sur l’évaluation par ultrasons du niveau d’adhésion d’un collage structural par ondes de Lamb. La première partie porte sur l’aspect cohésif et particulièrement sur l’influence du paramètre de réticulation de réseaux époxys sur les courbes de dispersion des ondes de Lamb. La deuxième partie est consacrée à la caractérisation de niveaux d’adhésion dans une structure bicouche Aluminium Epoxy en tenant compte aussi bien des aspects cohésifs qu’adhésifs. Des échantillons à niveau d’adhésion connus et maîtrisés sont réalisés avec l’aide de physico-chimistes, où l’époxy est partiellement ou totalement réticulé, et où l’interface substrat adhésif a subit différents traitements chimiques et/ou mécaniques. Les résultats expérimentaux sont confrontés à ceux issus du modèle rhéologique de Jones résolu par éléments finis. Enfin, la troisième partie porte sur l’étude d’un assemblage tricouche Aluminium/Epoxy/Aluminium et cherche à qualifier différents niveaux d’adhésion à l’aide du modèle de Jones par ondes guidées et également par l’étude des fréquences de coupure des modes verticaux de la structureThis thesis is in the context of the ANR ISABEAU (Innovating for Structural Adhesive Bonding Evaluation and Analysis with Ultrasounds, with the association of physico-chemists and acousticians) and seeks to bring new knowledge of the ultrasonic evaluation of the level of adhesion of structural bonding using Lamb waves. The first part focuses on the cohesive aspect, in particular on the influence of the crosslinking parameter of the polymer on the Lamb waves dispersion curves. The second part is dedicated to the evaluation of the adhesion level of a bi-layer Aluminum Epoxy taking into account the both cohesive and adhesive aspects. Samples of controlled and known adhesion levels are manufactured with the help of physico-chemists, where the crosslinking of the epoxy is partial or total, and the interface substrate-adhesive have been treated chemically and/or mechanically. The experimental results are compared to those obtained from a predictive model based on the rheological model of Jones solved by finite elements method. Finally, the third part focuses on the study of tri-layers Aluminum/Epoxy/Aluminum, looking for the qualification of different levels of adhesion with the Jones model using guided waves as well as the cut-off frequencies of the structure
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Kotrlá, Jitka. "Kontroverze obrazu ve veřejném prostoru na příkladu Lennonovy zdi v Praze (V perspektivě distribuce moci, destrukce a komunikace)." Master's thesis, 2019. http://www.nusl.cz/ntk/nusl-397737.
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The following diploma thesis deals with image destruction in the public space, specifically focuses on its selected fragments, which can be considered as communication messages. The work provides a synchronous and diachronic analysis of the subject of the research as well as the transformation of its statuses, thus concentrating on the acquisition, transformation and extinction of the symbolic meanings of the object within the cultural- historical complex. The pattern of destruction of the image in the public space is chosen as Lennon's Wall in Prague, whose constant visual and meaningful transformation is taking place today - against the backdrop of the historical, power and cultural context. The theoretical basis is based on the analysis of change based on the concept of "discourse" and "discourse formation" by Michel Foucault, as well as on the anchoring of methodology in CDA Norman Fairclough and DHA Ruth Wodak. Keywords Visual Image in Public Space, Lennon's Wall, Linking, Discourse, Destruction, Communication, Power.
Books on the topic "Lining destruction"
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Margaretten, Emily. Residing with the Spectral. University of Illinois Press, 2017. http://dx.doi.org/10.5406/illinois/9780252039607.003.0006.
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This chapter focuses on the psychological turmoil of street life under a roof. Rather than speak of their losses outright—the losses of kin, friends, and lovers to the violence of poverty and HIV/AIDS—the Point Place youth speak of uGogo, a ghostly grandmother who torments youth to their death by enticing them to jump out of windows. Drawing on the youth's narratives of despair and destruction, the chapter explores the various significations of uGogo's presence—a witch, an ancestor, or a drug-induced hallucination. It studies a symbolic analysis of uGogo, linking her floating associations to a broader discussion of spirituality, witchcraft, and death in post-apartheid South Africa.
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Cummings, Brian, and James Simpson. Introduction. Edited by James Simpson and Brian Cummings. Oxford University Press, 2015. http://dx.doi.org/10.1093/oxfordhb/9780199212484.013.0001.
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This book examines cultural history and cultural transformation in the period spanning the Middle Ages and Renaissance, and how such transition relates to modernity. Taking a dynamically diachronic approach, it offers a fresh perspective on the historiography of culture and literature, with emphasis on the idea of periodization and the tendency to divide cultural history into different eras. Many of the essays focus on themes spanning the fourteenth and seventeenth centuries, each linking pre- and post-Reformation cultures, including those related to religion, and highlight the creative and destructive anxieties as well as the legacy of the Reformation.
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Eliot, George, and K. M. Newton. Daniel Deronda. Edited by Graham Handley. Oxford University Press, 2014. http://dx.doi.org/10.1093/owc/9780199682867.001.0001.
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She felt herself standing at the game of life with many eyes upon her, daring everything to win much.’ Gwendolen Harleth gambles her happiness when she marries a sadistic aristocrat for his money. Beautiful, neurotic, and self-centred, Gwendolen is trapped in an increasingly destructive relationship, and only her chance encounter with the idealistic Deronda seems to offer the hope of a brighter future. Deronda is searching for a vocation, and in embracing the Jewish cause he finds one that is both visionary and life-changing. Damaged by their pasts, and alienated from the society around them, they must both discover the values that will give their lives meaning. George Eliot’s powerful novel is set in a Britain whose ruling class is decadent and materialistic, its power likely to be threatened by a politically emergent Germany. The novel’s exploration of sexuality, guilt, and the will to power anticipates later developments in fiction, and its linking of the personal and the political in a context of social and economic crisis gives it especial relevance to the dominant issues of the twenty-first century.
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Constantinesco, Thomas. Writing Pain in the Nineteenth-Century United States. Oxford University Press, 2022. http://dx.doi.org/10.1093/oso/9780192855596.001.0001.
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This book examines how pain is represented in a range of literary texts and genres from the nineteenth-century United States. It considers the aesthetic, philosophical, and ethical implications of pain across the works of Ralph Waldo Emerson, Harriet Jacobs, Emily Dickinson, Henry James, Elizabeth Stuart Phelps, and Alice James, as the national culture of pain progressively transformed in the wake of the invention of anesthesia. Through these writers, it argues that pain, while undeniably destructive, also generates language and identities, and demonstrates how literature participates in theorizing the problems of mind and body that undergird the deep chasms of selfhood, sociality, gender, and race of a formative period in American history. Writing Pain considers first Emerson’s philosophy of compensation, which promises to convert pain into gain. It then explores the limitations of this model, showing how Jacobs contests the division of body and mind that underwrites it and how Dickinson challenges its alleged universalism by foregrounding the unshareability of pain as a paradoxical measure of togetherness. The book investigates next the concurrent economies of affects in which pain was implicated during and after the Civil War and argues, through the example of James and Phelps, for queer sociality as a response to the heteronormative violence of sentimentalism. The last chapter on Alice James extends the critique of sentimental sympathy while returning to the book’s premise that pain is generative and the site of thought. By linking literary formalism with individual and social formation, Writing Pain eventually claims close reading as a method to recover the theoretical work of literature.
Book chapters on the topic "Lining destruction"
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Matkarimov, Sokhibjon T., Sardor K. Nosirkhujayev, Abdukahhar M. Saynazarov, Bakhriddin T. Berdiyarov, and Zaynobiddin T. Matkarimov. "Methods of Protection Against Destruction of Refractory Materials Used for Lining of Autogenous Smelting Furnaces." In Advances in Sustainability Science and Technology, 121–29. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-4321-7_11.
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Al-Ramadan, Khalid, Sadoon Morad, A. Kent Norton, and Michael Hulver. "Linking Diagenesis and Porosity Preservation Versus Destruction to Sequence Stratigraphy of Gas Condensate Reservoir Sandstones; The Jauf Formation (Lower to Middle Devonian), Eastern Saudi Arabia." In Linking Diagenesis to Sequence Stratigraphy, 297–335. West Sussex, UK: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118485347.ch13.
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Zabolotsky, Andrew V. "Thermal Shock and Modeling of Destruction for Refractory Linings of Metallurgical Installations." In Encyclopedia of Thermal Stresses, 5083–97. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-2739-7_82.
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Bonilla, Luis Carlos, Juan Carlos Forero, Hugo Perez, Jose Ricardo, Bernardo Rueda, Oscar Zurita, Miguel David Mendez Bohorquez, and Juan M. Mantilla. "Prediction of Refractory Lining Thickness in an Electric Furnace Using Thermography as a Non-destructive Testing Technique." In Lecture Notes in Civil Engineering, 289–98. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64908-1_27.
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Bonilla, Luis Carlos, Juan Carlos Forero, Hugo Perez, Jose Ricardo, Bernardo Rueda, Oscar Zurita, Miguel David Mendez Bohorquez, and Juan M. Mantilla. "Prediction of Refractory Lining Thickness in an Electric Furnace Using Thermography as a Non-destructive Testing Technique." In Lecture Notes in Civil Engineering, 289–98. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64908-1_27.
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Beckenbach, Frank, Maria Daskalakis, and David Hofmann. "Agent-Based Modelling of Novelty Creating Behavior and Sectoral Growth Effects—Linking the Creative and the Destructive Side of Innovation." In The Two Sides of Innovation, 129–58. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-01496-8_7.
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Noeske, Michael, Welchy Leite Cavalcanti, Hauke Brüning, Bernd Mayer, Antonios Stamopoulos, Apostolos Chamos, Thomas Krousarlis, et al. "Introduction to Recent Advances in Quality Assessment for Adhesive Bonding Technology." In Adhesive Bonding of Aircraft Composite Structures, 1–50. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-319-92810-4_1.
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AbstractThe first chapter highlights the relevance of both adhesive bonding technology and in-process quality assessment for mastering twenty-first-century challenges in joining functional and lightweight materials like carbon fibre reinforced polymers. The ongoing developments of the relevant technological and regulatory procedures and frameworks are hereby outlined, following trends for data-driven innovation and standardisation. Advances from monitoring process variables towards the in-depth and objective Extended Non-destructive Testing (ENDT) of material-related features are presented, based on methodological and technological innovation and insights from recent European joint research projects like Horizon 2020s ComBoNDT—“Quality assurance concepts for adhesive bonding of aircraft composite structures by advanced NDT”. Introducing ten heuristic principles for quality assessment in bonding processes, a concept is demonstrated for establishing empirically consolidated sets of quantitative material and process-specific correlations between design-relevant joint features and quality data measured during the manufacture or repair of adhesive joints using ENDT. Each correlation is obtained by systematically introducing disturbances of relevant process features identified by experts and is levelled once by linking findings from standardised mechanical tests with ENDT results obtained for joints that have intentionally been manufactured or repaired in an off-specification way. Subsequent chapters will demonstrate the suitability of the broadly applicable process.
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Lomholt, Søren, Morten A. Nielsen, Maithri P. Aspari, Peter B. Jørgensen, Adam P. Croft, Christopher Buckley, and Tue W. Kragstrup. "Fibroblast Like Synovial Cell Subsets in Rheumatoid Arthritis." In Fibroblasts - Advances in Cancer, Autoimmunity and Inflammation [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99240.
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Fibroblasts like synoviocytes (FLS) play several significant roles in rheumatoid arthritis (RA) pathophysiology. This chapter will describe known roles of FLS in disease initiation, joint inflammation, disease persistence and joint destruction. It will describe the newly characterized subsets of FLS based on single cell RNA sequencing studies, and their association to specific aspects of the disease. Finally, we will discuss the future of targeting FLS in the treatment of RA. The FLS in the synovial lining layer are identified by surface complement decay-accelerating factor (CD55) along with lubricin and metallopeptidase expression. Pathological activation of this lining layer subset result in bone and cartilage damage in mice. FLS of the sublining layer are often characterized by THY1 expression, but recent studies have highlighted a heterogeneity where several distinct subsets are identified by additional markers. Sublining FLS expressing human leukocyte antigen-DRA (HLA-DRA) produce C-X-C motif chemokine 12 (CXCL12) and receptor activator of nuclear factor-κB ligand (RANKL) and seems to constitute a pro-inflammatory subset that is associated with inflammation and tertiary lymphoid structures. Another subset of FLS characterized by CD34 expression may discriminate a common progenitor fibroblast subset. Taken together, studies isolating and characterizing gene expression in synovial FLS report both associations of unknown importance and markers that may impose protective or destructive features. This supports evidence of FLS as active players in RA pathology capable of cellular recruitment, local cellular crosstalk and promotion of joint destruction. These discoveries may serve as an atlas for synovial activation in RA and have identified several potential fibroblast markers for the development of targeted treatment.
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Distler, Oliver, and Caroline Ospelt. "Rheumatoid arthritis: basic mechanisms in joints." In ESC CardioMed, 1109–12. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780198784906.003.0271.
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Rheumatoid arthritis (RA) is a destructive polyarthritis which mostly starts in the small joints of the hands and feet. In the course of the disease, more proximal joints also become involved. The progressive destruction of joint structures is mediated by the chronically inflamed, hyperplasic synovial tissue, which attaches to and degrades the adjacent joint cartilage. Typical changes of the RA synovium are increased cellularity in the synovial lining and sublining layer, including vascularization, giant cell formation, and immigration of immune cells. The inflammatory cell infiltrate comprises macrophages, monocytes, dendritic cells, T cells, B cells, plasma cells, innate lymphoid cells, and mast cells. These cells together with resident stromal cells (synovial fibroblasts) form a complex network and maintain inflammatory and destructive processes via the secretion of various cytokines and chemokines. Intracellularly, cytokine-activated receptor signalling is mediated via protein kinase-dependent signalling pathways, such as mitogen-activated protein kinases and Janus kinase, which leads to the activation of transcription factors and thus changes in the transcriptional programme. Gene transcription is additionally modified by epigenetic mechanisms and post-transcriptionally by microRNA.
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"20 Staying Ahead of the Curve: Linking Creative Destruction and Expectations." In More Than You Know, 137–42. Columbia University Press, 2007. http://dx.doi.org/10.7312/maub14372-024.
Full textConference papers on the topic "Lining destruction"
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Lees, Albert, Andrea Jalbert, and M. Traverso. "Assessment of Success Biostabilization Techniques on Selected Watercrossings in Alberta." In 2006 International Pipeline Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/ipc2006-10082.
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Since the early 1980’s TransCanada PipeLines Ltd. (TransCanada) has employed a number of stream bank stabilization measures in an effort to minimize the loss of fish habitat and to reduce the risk of long term erosion and sedimentation. Traditional stream crossing stabilization involved the re-contouring of streambanks to a stable slope (generally 2:1) and then lining the banks with rock armour and seeding. TransCanada began using alternate techniques, primarily log-walls in 1981. Since 1981 TransCanada has evolved the use stream bank stabilization techniques to include bio-stabilization techniques such as live log-walls, fascines, live staking, and brush layering in combination with more traditional structures. In 2004, TransCanada initiated a two year project to assess the success of biostabilization techniques used on a number of watercrossing throughout the its’ Alberta System. A total of 22 stream crossings were assessed in 2004 and 24 in 2005. Sites assessed were located the foothills and boreal forest areas of Alberta. In the majority of cases the biostabilization methods utilized were still intact and functioning as planned by providing stable streambanks and fish habitat. Several factors appeared to be influencing the value of the measures employed. Cattle grazing on sites where fencing did not exclude cattle from the crossing site resulted in destruction or reduced value of the measures employed. Uncontrolled All Terrain Vehicle activity resulted in a reduced value of the measure employed. Implementation of biostabilization techniques in the winter months (frozen ground conditions) created challenges in implementation of biostabilization measures resulting in less favorable results compared to other sites constructed in early and late fall. Seeding to control surface erosion also appeared to affect overall success of woody vegetation used as part of the biostabilization techniques. Biostabilization techniques employed by TransCanad have been effective in stabilizing watercrossings and providing fish habitat. In designing biostabilization systems for watercrossings consideration should be given to overall stabilization objectives, stream flow information, fish and fish habitat values, and likelihood of success given the geographic region, timing of construction, and surrounding land-use pressures.
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Hussain, Maaruf, AbdulJamiu Amao, Guodong Jin, and Khalid Al-Ramadan. "Linking Geochemical and Mechanical Properties of Rock Samples Using New Non-Destructive Techniques." In SPE Kingdom of Saudi Arabia Annual Technical Symposium and Exhibition. Society of Petroleum Engineers, 2018. http://dx.doi.org/10.2118/192347-ms.
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Lloyd, John, Theresa Christian, Dan Doble, and Rafal A. Mickiewicz. "Non-destructive measurement of the degree of cross-linking of EVA solar module encapsulation." In 2011 37th IEEE Photovoltaic Specialists Conference (PVSC). IEEE, 2011. http://dx.doi.org/10.1109/pvsc.2011.6186408.
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Sandulache, Irina, Mihaela-Cristina Lite, Lucia-Oana Secareanu, Elena-Cornelia Mitran, Ovidiu Iordache, and Elena Perdum. "Effects of UV, humidity, and high temperature exposure on linen fibers." In The 8th International Conference on Advanced Materials and Systems. INCDTP - Leather and Footwear Research Institute (ICPI), Bucharest, Romania, 2020. http://dx.doi.org/10.24264/icams-2020.v.11.
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Generally, the most common damaging factors for linen textile materials are the environmental conditions, their handling, and natural decay. Such environmental factors are ultraviolet (UV) radiation, humidity, and high temperature. Therefore, to investigate the effects these factors may cause, an accelerated weathering test was conducted on linen fabrics, using alternating cycles of UV exposure and humidity, along with relatively high temperatures. The effects of this test were investigated using non-destructive and micro-destructive analysis techniques. Scanning Electron Microscopy (SEM) was used to observe any modifications appearing at the surface of the fibers. Energy Dispersive X-Ray Analysis (EDS) was employed in conjunction with SEM for obtaining the spectrum of the chemical elements that were present at the surface of the linen samples. The modifications of functional groups occurring due to the weathering of linen were assessed by Fourier-Transform Infrared Spectroscopy (FT-IR). The color change of the samples was measured with a spectrophotometer. All the acquired information can be used as a starting point for the development of customized environmental parameters for keeping patrimony linen fabrics in museums in optimum conditions, thus preventing further damage. Additionally, the artificially weathered fabrics will be further employed in conservation experiments as substitute for old linen fabrics.
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VASILIAUSKIENĖ, Dovilė, Giedrius BALČIŪNAS, and Jaunius URBONAVIČIUS. "ISOLATION AND IDENTIFICATION OF FUNGI GROWING ON FIBRE HEMP SHIVE BASED THERMAL INSULATION MATERIALS." In Conference for Junior Researchers „Science – Future of Lithuania“. VGTU Technika, 2018. http://dx.doi.org/10.3846/aainz.2018.007.
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Green thermal insulation materials are ecological materials with hemp, linen, jute, wood waste, maize starch, and other types of waste added to polymer-based composites. Such kind of materials are susceptible to the microbial action which can lead to changes of physico-chemical properties of materials, their destruction and also health problems in humans. Here, we isolated and identified several fungal strains that grow on fibre hemp shive based materials. Three isolates were identified as belonging to Trichoderma (Hypocrea) genus. Our further experiments will be concentrated on the monitoring of growth of newly isolated fungi on and/or inside the materials of interest, isolation and characterisation of the hydrolytic enzymes as well as following the mode of material destruction caused by the fungal growth.
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Sadooni, Fadhil N., Hamad Al-Saad Al-Kuwari, Ahmad Sakhaee-Pour, and Wael S. Matter. "Linking Depositional Environments and Diagenetic Processes to Porosity Evolution and destruction in the Arab Formation reservoirs, Offshore oilfields of Qatar." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0043.
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Introduction: The Jurassic Arab Formation is the main oil reservoir in Qatar. The Formation consists of a succession of limestone, dolomite, and anhydrite. Materials and methods: A multi-proxy approach has been used to study the Formation. This approach is based on core analysis, thin sections, and log data in selected wells in Qatar. Results: The reservoir has been divided into a set of distinctive petrophysical units. The Arab Formation consists of cyclic sediments of oolitic grainstone/packstone, foraminifera-bearing packstone-wackestone, lagoonal mudstone and dolomite, alternating with anhydrite. The sediments underwent a series of diagenetic processes such as leaching, micritization, cementation, dolomitization and fracturing. The impact of these diagenetic processes on the different depositional fabrics created a complex porosity system. So, in some cases there is preserved depositional porosity such as the intergranular porosity in the oolitic grainstone, but in other cases, diagenetic cementation blocked the same pores and eventually destroyed them. In other cases, diagenesis improved the texture of non-porous depositional texture such as mudstone through incipient dolomitization creating inter-crystalline porosity. Dissolution created vugs and void secondary porosity in otherwise non-porous foraminiferal wackestone and packstone. Therefore, creating a matrix of depositional fabrics versus diagenetic processes enabled the identification of different situations in which porosity was either created or destroyed. Future Directions: By correlating the collected petrographic data with logs, it will become possible to identify certain “facio-diagenetic” signatures on logs which will be very useful in both exploration and production. Studying the micro and nano-porosity will provide a better understanding of the evolution and destruction of its porosity system.
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Latynin, A. V., A. N. Shvyriov, M. A. Nikulin, and O. S. Garkusha. "THERMAL NON-DESTRUCTIVE CONTROL AS A METHOD FOR DETERMINING HIDDEN DEFECTS OF MACHINE UNITS." In Innovative technologies in road transport. Voronezh State University of Forestry and Technologies named after G.F. Morozov, Voronezh, Russia, 2021. http://dx.doi.org/10.34220/itrt2021_77-79.
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Currently, non-destructive testing methods are promising technologies for control-ling the quality of materials. Such technologies make it possible to identify internal defects not only in new products, but also to constantly monitor newly arising defects of already operating machines. The article presents materials aimed at considering methods of thermal non-destructive testing.
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Mickiewicz, Rafal A., Ed Cahill, and Po-I. Wu. "Non-destructive determination of the degree of cross-linking of EVA solar module encapsulation Using DMA shear measurements." In 2012 IEEE 38th Photovoltaic Specialists Conference (PVSC). IEEE, 2012. http://dx.doi.org/10.1109/pvsc.2012.6317707.
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Stark, Timothy Dwight, and Calvin Stapleton. "Modular Construction with Geosynthetics in Petroleum Industry." In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207246-ms.
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Abstract This paper focuses on the use of modular construction techniques for installing geosynthetics in petroleum related applications. The petroleum industry uses geosynthetics for drill pad liners, above-ground and in-ground containment ponds, storage tanks, various impoundments including tailings storage, floating covers, road creation and/or support to remote sites, filtration, lining freshwater storage areas, dewatering, and stormwater management. Accelerating the construction of these facilities and the quality, i.e., no leaks, of the installation will have a positive impact on the financial and environmental aspects of the petroleum industry. Modular construction is a process in which a petroleum containment system is constructed primarily off-site, under controlled factory conditions, using the same design, materials, equipment, testing, and construction quality assurance and control (CQA/CQC) techniques as a field constructed facility – but usually in about one-half the time, for significantly less cost, and with few, if any, defects. This is due to the clean and constant conditions present in a factory setting. For example, installation of a factory-fabricated geomembrane can occur simultaneously while site work is being conducted. With factory fabrication, no destructive sampling and testing of the field welds that join rolls of the geomembrane are needed. As a result, a factory fabricated geomembrane can be installed in at least one-half of the time required for traditional field fabrication and with higher quality. This results in the containment system being utilized sooner, being more protective, and creating a faster return on investment.
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Felcis, Elgars. "Agroecological practices as sustainable management of common natural resources: the case of Latvian permaculture movement." In Research for Rural Development 2021 : annual 27th International scientific conference proceedings. Latvia University of Life Sciences and Technologies, 2021. http://dx.doi.org/10.22616/rrd.27.2021.002.
Full textAbstract:
Scientific evidence is robust about the environmentally destructive side-effects of the current industrial civilization and that requires radical actions to safeguard sustainable management of natural resources and liveable Planet Earth. Agroecology as a broader movement serves some of this role in demonstrating alternative practices in food production and ecosystem management. This paper demonstrates that the permaculture movement in Latvia is developing as a recognized alternative on the pathway to solutions, linking to the work elsewhere done on management of common natural resources – the things that no one owns and are shared by everyone. The author have explored the development of the permaculture movement in Latvia since its first roots in the late 2000s and the establishment of the Latvian Permaculture Association (LPA) in 2011. The contribution of the movement manifests itself in diverse aspects. It unifies various sustainability-oriented people, grounds itself in locality and traditions, organises practically oriented events to upskill people, and collaborates with Latvian environmental organisations and internationally. Within the research the author consciously opted for an in-depth involvement and co-creation of initiatives within the permaculture movement, leading the LPA since 2016 and organizing multiple events and workshops. That leads to further reflections on the role and necessity for participatory action research for sustainability transformations and common natural resources.