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Chu, Mingjin. "Preface: A SPECIAL ISSUE ON PROGRESS IN CIVIL ENGINEERING." Open Civil Engineering Journal 8, no. 1 (September 4, 2014): 154. http://dx.doi.org/10.2174/1874149501408010154.
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The Open Civil Engineering Journal, which is one of the most relevant international journals in civil engineering area, wishes to promote the latest researches in engineering structures. This special issue contains 8 invited outstanding articles covering a wide range of topics. We have assembled recent studies in the field of several typical structures, attempting to provide a glimpse into the wide range of engineering problems. It is expected that the special issue will benefit researchers and engineers who are interested in the design of protective structures and stimulate the research interests in this important an d promising area of civil engineering. A brief overview of each article published in this special issue is provided here. In “Experimental Study on Assembled Monolithic Concrete Shear Walls Built with Precast Two-way Hollow Slabs” , Zhijuan Sun et al. present a quasi-static experiment on one reinforced concrete shear wall and two shear walls built with precast two-way hollow slab. Test result shows that the new type of shear walls experienced the loading process from the whole wall to the portioned wall due to the internal and vertical joints of the wall body, which can be applied in practical construction. In “Study on Metering Scheme of Seismic Experiment for Shear Wall Built with Precast Hollow Slab” , Zhijuan Sun et al. present the measuring scheme of shear wall deformation and steel strain. The special mechanical characteristic of the shear wall built with precast two-way hollow slab is the relative deformation of the concrete on both sides of vertical joint. The study shows that the measuring methods of shear wall deformation and relative deformation are reasonable and feasible. In “Experimental Study on Precast Concrete Shear Walls with Different Hollow Slabs” , Qinyan Zhao et al. present a test on two shear walls built with precast two-way hollow slab with different details. The study shows that brittle shear failure can be avoided and the failure behaviors tend to evolve from integral wall to the combination of wall and columns. Also, compressive capacity of walls can be affected by the dimension of transverse holes. In “Test Study on Strength and Permeability Properties of Lime -Fly Ash Loess Under Freeze-Thaw Cycles”, Zhiquan Zhang and Yufen Zhang present a study on the engineering behaviors of lime-fly ash loess using uniaxial compressive test, fast direct shearing test and permeability test. Test data show that uniaxial compressive strength of lime-fly ash loess has good water stability and freeze-thaw stability, and can be applied in permafrost subgrade. In “Unloading Phenomena Characteristics in Brittle Rock Masses by A Large-scale Excavation in Dam Foundation”, Changgen Yan et al. investigate a large-scale excavation around the foundation of the dam. The characteristics of unloading rock masses were described with the acoustic wave velocity monitoring method. The unloading deformation has a direct temporal dependence, and increases quickly during the first 90 days, then with a slower rate from 90 to 180 days, and after that the unloading deformation will be small enough to be neglected In “A Review on Progressive Collapse of Building Structures” , Hao Wang et al. assess the recent studies on the progressive collapse of building structures from experimental study, numerical simulation and theoretical analysis. The design methods to prevent progressive collapse for building structures are also discussed. In “Damage Identification of Continuous Rigid Frame Concrete Bridge”, Shengnan Huang et al. present a large-scale experimental study on safety monitoring methodology for continuous rigid frame concrete bridge. Two load stages and ten different load steps were simulated to test various scenario of long-term loading and different levels of overload. Curva ture mode method was adopted to detect the damage during the exercises. In addition, the Finite-Element Analysis (FEA) was utilized, and the experimental recurring was verified positively through FEA model. In “Corrosion Monitoring Using Embedded Piezoelectric Sensors”, Lei Qin et al. develop a new type of corrosion detection technique for reinforced concrete. The technique used piezoelectric sensors to detect the ultrasonic signals during corrosion. The state of bonding layer of concrete and steel bar could be monitored. It can also detect the initial of corrosion and cracking of bonding layer. I am grateful to all the authors and reviewers for the contribution and support during the course of editing this special issue. Their prompt responses have made it possible for us to publish this special issue on time.
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PALMER, JOHN R. "Yes, ‘Awaken’, and the progressive rock style." Popular Music 20, no. 2 (May 2001): 243–61. http://dx.doi.org/10.1017/s026114300100143x.
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Going for the One was a good rebirth of Yes at that time, to find its feet and really know what it wanted to do. And we made ‘Awaken’ . . . (Morse 1996, p. 58).Since the release of their third recording, The Yes Album, in March 1971, the music of the English band Yes has been associated with the rock music substyle called ‘progressive rock’. The first two Yes albums showcase a very capable, inventive group of musicians who drew freely from the multitude of sounds around them, emulating aspects of the various musical styles they found engaging. However, it was not until they composed the works appearing on The Yes Album that the band coupled this eclecticism with a quest for originality to develop a voice highly idiosyncratic when judged against prevailing popular music styles. Subsequent albums reveal a predeliction for experimentation and expansion, and successful record sales in both the UK and US encouraged further development in the same direction. Although not members of the ‘first wave’ of progressive rock bands, Yes became ‘codifiers’ and for many, especially later detractors, the flagship of the ‘progressive' fleet. Before I go on to describe and illustrate, through the analysis of a particular song, aspects of Yes's musical language, I will briefly describe the environment in which it appeared and flourished.
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KEISTER, JAY, and JEREMY L. SMITH. "Musical ambition, cultural accreditation and the nasty side of progressive rock." Popular Music 27, no. 3 (October 2008): 433–55. http://dx.doi.org/10.1017/s0261143008102227.
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AbstractProgressive rock of the early 1970s has been demonised as a nadir in the history of rock primarily because of the ambitions of progressive rock musicians. Critics have interpreted these ambitions as attempts to elevate rock music to the level of high art in order to gain cultural accreditation from an unspecified cultural elite. This interpretation is further compounded by the common notion that progressive rock’s subject matter is dominated more by individualistic quests for spirituality than by socio-political critique, resulting in a stereotype of progressive rock as apolitical, pretentious and conventionally upwardly mobile. Critics who have propagated this stereotype – including some musicologists – have misunderstood the countercultural politics of young musicians during this era and have overlooked the highly developed musical poetics of progressive rock that were in fact highly politicised. This paper examines four of the leading progressive rock bands of the early 1970s – Emerson, Lake and Palmer, King Crimson, Genesis and Yes – and reveals the nasty side of progressive rock: a scathing criticism of rampant militarism and social conformity that runs counter to the prevailing narrative in which the genre is dismissed as an escapist fantasy with an elitist agenda.
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Anderton, Chris. "A many-headed beast: progressive rock as European meta-genre." Popular Music 29, no. 3 (October 2010): 417–35. http://dx.doi.org/10.1017/s0261143010000450.
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AbstractThere has been a marked resurgence of interest in progressive rock music both commercially and critically, with a number of articles and books now reassessing its styles, meanings, politics and appeal. Despite this, there has been a tendency to define progressive rock through a ‘symphonic orthodoxy’ which preferences a limited, albeit highly successful, number of British groups operating in a relatively narrow sonic landscape. This article questions that orthodoxy by drawing on the lay definitions and understandings of fans to extend the definitions and geographies of progressive rock, and to characterise it as a European meta-genre. It examines the meta-genre's formative years at the beginning of the 1970s, and argues that progressive rock was inspired by the explorations of a European youth counterculture whose music was influenced by local socio-political and economic contexts, as well as by the music and attitudes of the American counterculture and of European Romanticism.
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Whiteley, Sheila. "Progressive rock and psychedelic coding in the work of Jimi Hendrix." Popular Music 9, no. 1 (January 1990): 37–60. http://dx.doi.org/10.1017/s026114300000372x.
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Discussion of the 1960s generally identifies progressive rock as the prime organ of communication within the counter-culture. At the same time, musical analysis of the genre is an underdeveloped field of study, including only an identification of musical characteristics (Willis 1978), Mellers' analysis of the Beatles (1973) and Middleton and Muncie's analysis of five representative songs in the Open University's course, Popular Culture (1981). As a particularly heterogeneous genre (compared with, for example, rock 'n' roll and r&b), definitions of progressive rock equally raise problems: to what extent does the variety of styles reflect the variety of radical movements contained within the overall term counter-culture; alternatively, given the variety of styles, can progressive rock be considered a single phenomenon and, if so, to what extent does it have musical codes in common?
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Carlson, Charles R., Panayiota E. Bacaseta, and Dexter A. Simanton. "A Controlled Evaluation of Devotional Meditation and Progressive Relaxation." Journal of Psychology and Theology 16, no. 4 (December 1988): 362–68. http://dx.doi.org/10.1177/009164718801600407.
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The present study was conducted to determine the effects of devotional meditation (DM), defined as a period of prayer and quiet reading and pondering of biblical material, on physiological and psychological variables related to stress. It was hypothesized that religious persons engaging in DM experience physiological and psychological changes similar to those reported for persons using progressive relaxation (PR) exercises. Thirty-six participants, equally divided by sex into 3 groups: DM, PR, and a Wait List Control, underwent extensive psychophysiological assessment prior to and following a systematic introduction to either DM or PR. The hypothesis that DM could generate positive physiological and psychological effects similar to PR was partially confirmed. The results of the study are discussed in terms of the unique spiritual resources inherent among a Christian population that might foster physiological and psychological relaxation.
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KAWAMOTO, AKITSUGU. "‘Can You Still Keep Your Balance?’: Keith Emerson's anxiety of influence, style change, and the road to prog superstardom." Popular Music 24, no. 2 (May 2005): 223–44. http://dx.doi.org/10.1017/s0261143005000425.
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Harold Bloom's theory of poetic influence has been applied to studies of Western art music, but rarely to studies of popular music. This article investigates the applicability of his theory to the music of British progressive rock keyboardist Keith Emerson. It will be argued that, while Emerson's overtly intertextual music for The Nice cannot be well illuminated with this theory, Bloom can help us explore and interpret some delicate aesthetic aspects of the important style change from The Nice to Emerson, Lake and Palmer (ELP). Emerson felt the anxiety of The Nice's influence upon ELP, changed his style because of it, and led the new group to prog rock superstardom. Bloom's six revisionary ratios can indeed shed light on those subtle qualities which were necessary for a progressive rock ideology to be ‘mainstreamed’ and sold as commodity – qualities that resulted from a process of ‘misreading’.
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Dowd, Timothy J., Trent Ryan, Vaughn Schmutz, Dionne Parris, Ashlee Bledsoe, and Dan Semenza. "Retrospective Consecration Beyond the Mainstream: The Creation of a Progressive Rock Canon." American Behavioral Scientist 65, no. 1 (July 29, 2019): 116–39. http://dx.doi.org/10.1177/0002764219865315.
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Based on a sample of 28,360 albums identified by an online community devoted to progressive rock, this article examines factors that shape the retrospective consecration of music that operates beyond the mainstream. Drawing on previous work on fields of cultural production, genre trajectories, and creative careers, the article produces findings that both replicate and innovate. As in previous research, critical acclaim greatly enhances the likelihood of consecration; however, it is not mainstream critics but underground critics whose opinions are most influential and most consistent with popular appeal among the progressive rock audience. Likewise, although performers from the “first wave” of progressive rock and from the United Kingdom have an advantage in getting consecrated, a more recent wave of performers in the online era see higher odds of consecration and there is neither a significant advantage for U.S.-based performers nor a significant disadvantage for performers from the margins. Findings suggest that the relationship between different types of legitimation varies across fields and that in progressive rock—a field with a high degree of aesthetic solidarity—some sources of acclaim often thought of as being in competition are actually compatible.
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Hsu, Wendy F. "Troubling genre, ethnicity and geopolitics in Taiwanese American independent rock music." Popular Music 32, no. 1 (January 2013): 91–109. http://dx.doi.org/10.1017/s0261143012000578.
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AbstractThis paper examines the performances of Taiwanese American Jack Hsu and his New Jersey-based progressive erhu-rock band The Hsu-nami, in transnational contexts fraught by ethnonationalism and race. Through an ethnographic approach, this paper highlights the band's depoliticising practice to deflect the geopolitics across the Taiwan Strait. It also discusses how Hsu adapts the musical and gender ideologies in rock music culture to diffuse racial ideologies surrounding his ethnicity and instrument. Finally, an analysis of the band's deployment of cultural diplomacy discusses pragmatic multiculturalism, a mode that reflects the tension between rock music's ostensibly counter-cultural front and its commercial foundation.
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Janssen, Rob P. A., Nicky van Melick, Jan B. A. van Mourik, Max Reijman, and Lodewijk W. van Rhijn. "ACL reconstruction with hamstring tendon autograft and accelerated brace-free rehabilitation: a systematic review of clinical outcomes." BMJ Open Sport & Exercise Medicine 4, no. 1 (April 2018): e000301. http://dx.doi.org/10.1136/bmjsem-2017-000301.
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ObjectiveTo investigate the clinical outcomes after hamstring tendon autograft ACL reconstruction (ACLR) with accelerated, brace-free rehabilitation.DesignSystematic review according to Preferred Reporting Items for Systematic Reviews and Meta-Analysis guidelines.Data sourcesEmbase, MEDLINE Ovid, Web of Science, Cochrane CENTRAL and Google scholar from 1 January 1974 to 31 January 2017.Eligibility criteria for selecting studiesStudy designs reporting outcomes in adults after arthroscopic, primary ACLR with hamstring autograft and accelerated, brace-free rehabilitation.ResultsTwenty-four studies were included in the review. The clinical outcomes after hamstring tendon autograft ACLR with accelerated brace-free rehabilitation were the following: (1) early start of open kinetic exercises at 4 weeks in a limited range of motion (ROM, 90°−45°) and progressive concentric and eccentric exercises from 12 weeks did not alter outcomes, (2) gender and age did not influence clinical outcomes, (3) anatomical reconstructions showed better results than non-anatomical reconstructions, (4) there was no difference between single-bundle and double-bundle reconstructions, (5) femoral and tibial tunnel widening occurred, (6) hamstring tendons regenerated after harvest and (7) biological knowledge did not support return to sports at 4–6 months.ConclusionsAfter hamstring tendon autograft ACLR with accelerated brace-free rehabilitation, clinical outcome is similar after single-bundle and double-bundle ACLR. Early start of open kinetic exercises at 4 weeks in a limited ROM (90°−45°) and progressive concentric and eccentric exercises from 12 weeks postsurgery do not alter clinical outcome. Further research should focus on achievement of best balance between graft loading and graft healing in the various rehabilitation phases after ACLR as well as on validated, criterion-based assessments for safe return to sports.Level of evidenceLevel 2b; therapeutic outcome studies.
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Atton, Chris. "Progressive Rock Reconsidered. Edited by Kevin Holm-Hudson. New York and London: Routledge, 2002. 280 pp." Popular Music 21, no. 3 (October 2002): 375–88. http://dx.doi.org/10.1017/s026114300226225x.
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Vancampfort, Davy, Michel Probst, Liv Helvik Skjaerven, Daniel Catalán-Matamoros, Amanda Lundvik-Gyllensten, Antonia Gómez-Conesa, Rutger Ijntema, and Marc De Hert. "Systematic Review of the Benefits of Physical Therapy Within a Multidisciplinary Care Approach for People With Schizophrenia." Physical Therapy 92, no. 1 (January 1, 2012): 11–23. http://dx.doi.org/10.2522/ptj.20110218.
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BackgroundAlthough schizophrenia is the fifth leading cause of disability-adjusted life years worldwide in people aged 15 to 44 years, the clinical evidence of physical therapy as a complementary treatment remains largely unknown.PurposeThe purpose of this study was to systematically review randomized controlled trials (RCTs) evaluating the effectiveness of physical therapy for people with schizophrenia.Data SourcesEMBASE, PsycINFO, PubMed, ISI Web of Science, Cumulative Index to Nursing and Allied Health Literature (CINAHL), Physiotherapy Evidence Database (PEDro), and the Cochrane Library were searched from their inception until July 1, 2011, for relevant RCTs. In addition, manual search strategies were used.Study SelectionTwo reviewers independently determined study eligibility on the basis of inclusion criteria.Data ExtractionReviewers rated study quality and extracted information about study methods, design, intervention, and results.Data SynthesisTen RCTs met all selection criteria; 6 of these studies addressed the use of aerobic and strength exercises. In 2 of these studies, yoga techniques also were investigated. Four studies addressed the use of progressive muscle relaxation. There is evidence that aerobic and strength exercises and yoga reduce psychiatric symptoms, state anxiety, and psychological distress and improve health-related quality of life, that aerobic exercise improves short-term memory, and that progressive muscle relaxation reduces state anxiety and psychological distress.LimitationsThe heterogeneity of the interventions and the small sample sizes of the included studies limit overall conclusions and highlight the need for further research.ConclusionsPhysical therapy offers added value in the multidisciplinary care of people with schizophrenia.
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Battaglini, Claudio, Martim Bottaro, Carolyn Dennehy, Logan Rae, Edgar Shields, David Kirk, and Anthony Hackney. "The effects of an individualized exercise intervention on body composition in breast cancer patients undergoing treatment." Sao Paulo Medical Journal 125, no. 1 (January 2007): 22–28. http://dx.doi.org/10.1590/s1516-31802007000100005.
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CONTEXT AND OBJECTIVE: Changes in metabolism have been reported in the majority of patients undergoing cancer treatment, and these are usually characterized by progressive change in body composition. The effects of aerobic exercise programs to combat the cancer and cancer treatment-related side effects, which include the negative changes in body composition, have been extensively reported in the literature. However, few resistance exercise intervention studies have hypothesized that breast cancer patients might benefit from this type of exercise. The purpose of this study was to determine whether exercise protocols that emphasize resistance training would change body composition and strength in breast cancer patients undergoing treatment. DESIGN AND SETTING: Randomized controlled trial, at the Campus Recreation Center and Rocky Mountain Cancer Rehabilitation Institute of the University of Northern Colorado, and the North Colorado Medical Center. METHODS: Twenty inactive breast cancer patients were randomly assigned to a 21-week exercise group (n = 10) or a control group (n = 10). The exercise group trained at low to moderate intensity for 60 minutes on two days/week. The primary outcome measurements included body composition (skinfold method) and muscle strength (one repetition maximum). RESULTS: Significant differences in lean body mass, body fat and strength (p = 0.004, p = 0.004, p = 0.025, respectively) were observed between the groups at the end of the study. CONCLUSION: The results suggest that exercise emphasizing resistance training promotes positive changes in body composition and strength in breast cancer patients undergoing treatment.
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Paolucci, T., S. Sbardella, C. La Russa, F. Agostini, M. Mangone, L. Tramontana, A. Bernetti, et al. "Evidence of Rehabilitative Impact of Progressive Resistance Training (PRT) Programs in Parkinson Disease: An Umbrella Review." Parkinson's Disease 2020 (May 26, 2020): 1–9. http://dx.doi.org/10.1155/2020/9748091.
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Parkinson disease (PD) is a chronic neurodegenerative condition that leads to progressive disability. PD-related reductions in muscle strength have been reported to be associated with lower functional performance and balance confidence with an increased risk of falls. Progressive resistance training (PRT) improves strength, balance, and functional abilities. This umbrella review examines the efficacy of PRT regarding muscular strength in PD patients. The PubMed, PEDro, Scopus, and Cochrane Library databases were searched from January 2009 to August 2019 for systematic reviews and meta-analyses conducted in English. The populations included had diagnoses of PD and consisted of males and females aged >18 years old. Outcomes measured were muscle strength and enhanced physical function. Eight papers (six systematic reviews and meta-analyses and two systematic reviews) were considered relevant for qualitative analysis. In six of the eight studies, the reported severity of PD was mild to moderate. Each study analyzed how PRT elicited positive effects on muscle strength in PD patients, suggesting 10 weeks on average of progressive resistance exercises for the upper and lower limbs two to three times per week. However, none of the studies considered the postworkout follow-up, and there was no detailed evidence about the value of PRT in preventing falls. The possibility of PRT exercises being effective for increasing muscle strength in patients with PD, but without comorbidities or severe disability, is discussed. Overall, this review suggests that PRT should be included in rehabilitation programs for PD patients, in combination with balance training for postural control and other types of exercise, in order to preserve cardiorespiratory fitness and improve endurance in daily life activities.
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Duprez, D. A., L. K. Essandoh, P. M. Vanhoutte, and J. T. Shepherd. "Vascular responses in forearm and calf to contralateral static exercises." Journal of Applied Physiology 66, no. 2 (February 1, 1989): 669–74. http://dx.doi.org/10.1152/jappl.1989.66.2.669.
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Ten normal subjects performed a 90-s isometric exercise [20, 30, and 40% of maximal voluntary contraction (MVC) of the flexor muscle of the right index finger or quadriceps muscle of the right leg. Contralateral forearm and calf blood flows (strain gauge plethysmography) and arterial blood pressure (auscultation) were measured simultaneously. Each exercise caused a decrease in forearm vascular resistance and a progressive increase in calf resistance. These changes were greatest with the 40% MVC. With finger exercise at 20 and 40% MVC, the percentage decreases in forearm vascular resistance from control were 12.3 and 22.7%, respectively (P less than 0.01). Similar decreases (9.5 and 24.9%, respectively; P less than 0.01) were noted with exercise of the quadriceps muscle. By contrast, the corresponding increases in calf vascular resistance were greater (P less than 0.01) with quadriceps exercise (13.3 and 55.4%, respectively) than with finger exercise (6.0 and 36.0%). Arrest of the circulation to the exercising muscles just before the exercise ended caused an abrupt increase in forearm vascular resistance and a decrease in calf resistance. These studies provide further evidence of the heterogeneity of responses of forearm and calf resistance vessels to certain cardiovascular stimuli.
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Timofeeva, Nadezhda Pavlovna, Yuliya Aleksandrovna Fokeeva, and Lidiya Arkadyevna Fedorchukova. "Cognitive processes development of future interpreters in the course of the professional training." Samara Journal of Science 8, no. 1 (February 28, 2019): 303–7. http://dx.doi.org/10.17816/snv201981316.
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The paper deals with the specifics of interpretation skills development. The authors review the role of an interpreter in the act of communication, point out different aspects of interpretation, the success of which is determined by the ability for cross-cultural dialogue. As far as several sensory channels in the work of the interpreter are used, the necessity of special training of concentration, memory, thinking and oral skills and abilities is stated. Moreover the ways of cognitive processes development of future interpreters are described. It should be noted that a set of special exercises for cognitive processes perfection is given. The technique was tested during the training of third-year students studied interpreting. The paper contains a comparative analysis of results taken from diagnostics of both student groups training by the mentioned system of tasks and student groups training without this system. The studies carried out show that students training with special set of exercises focused on cognitive processes development demonstrate higher results. The data obtained can be used for further theoretical studies and for search of progressive methodical decisions.
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Slade, Susan C., David I. Finkelstein, Jennifer L. McGinley, and Meg E. Morris. "Exercise and physical activity for people with Progressive Supranuclear Palsy: a systematic review." Clinical Rehabilitation 34, no. 1 (September 27, 2019): 23–33. http://dx.doi.org/10.1177/0269215519877235.
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Objective: To conduct a systematic review to evaluate exercise and structured physical activity for people living with Progressive Supranuclear Palsy. Data sources: AMED, CINAHL, Cochrane, EMBASE, Informit, MEDLINE, PEDro, PsycINFO, PubMed and SportDiscus were searched until 18 August 2019. Reference lists of included studies were hand-searched. Methods: Cochrane guidelines informed review methods. English language peer-reviewed studies of any design, in any setting, were included. Method quality was appraised with the Physiotherapy Evidence Database scale and Joanna Briggs Institute instruments. Data were extracted for study design, sample characteristics and therapy content. Effectiveness was calculated where possible. Results: Eleven studies were included. Method appraisal showed moderate to high risk of bias. Research designs included three randomized controlled trials, two quasi-experimental studies, one cohort study, four case studies and one case series. Sample sizes ranged from 1 to 24. Exercise interventions included supported and robot-assisted gait training, gaze training, balance re-education and auditory-cued motor training. Dosage ranged from two to five sessions per week over four to eight weeks. End-of-intervention effect sizes were small (6-minute walk test: –0.07; 95% confidence interval (CI): –0.87, 0.73) to moderate (balance: –0.61; 95% CI: –1.40, 0.23; Timed Up and Go: 0.42; 95% CI: –0.49, 1.33) and statistically non-significant. Function, quality of life and adverse events were inconsistently reported. Conclusions: For people with Progressive Supranuclear Palsy, robust evidence was not found for therapeutic exercises. Reported improvements in walking were derived from two clinical trials. The effects of structured physical activity for people with advanced Progressive Supranuclear Palsy are not known.
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Kłopotowska, Agnieszka Katarzyna, and Paweł Łukaszewski. "The Influence of the Salt Mist on the Deterioration of Rock Materials." Studia Geotechnica et Mechanica 36, no. 1 (March 1, 2014): 37–45. http://dx.doi.org/10.2478/sgem-2014-0005.
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Abstract The paper is focused on changes of geomechanical properties with regard to loss of long-term resistance in studies on the influence of salt spray on the structure of selected rocks from Poland. The investigation has shown that the analyzed rock material shows variable susceptibility to this corrosive factor. The most susceptible to ageing by salt mist were Śmiłów sandstones, whose progressive deterioration was observed in subsequent cycles. Analysis of resistance parameters has shown decreased resistance to uniaxial compression exceeding 30% also in the case of the Józefów limestones. Limestones from Raciszyn have revealed high resistance to ageing by salt mist.
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Huang, Man, Dan Liu, Chenjie Hong, Shigui Du, Zhanyou Luo, Changhong Li, and Yongliang Huang. "Representative Sample Sampling Method for Size Effect Experiment of Jointed Rock Mass." Geofluids 2020 (August 25, 2020): 1–8. http://dx.doi.org/10.1155/2020/8870387.
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The influence of size effect on the hydromechanical behavior of rock mass has long been recognized. As a result, analysis of the rock mass size effect has been developed. However, when conducting size effect studies, the representativeness of the sample is less considered. Therefore, combining the existing statistical methods and sampling methods, a comprehensive representative sampling method for rock mass is present. In this method, a large number of sample statistics of different sizes are provided in the progressive coverage method; then, the plane density of the track length is defined as the value of stratification to perform stratified sampling for representative samples. Furthermore, it is applied to a joint network model generated in accordance with the actual situation and compared with those of other methods. The sampling results show that the proposed method can provide a certain reference value for studying the scale-dependent behavior of rock mass mechanical parameters.
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Zhu, Wan Cheng, Jin Chao Duan, Chun An Tang, and Shan Yong Wang. "Digital Image Based Simulation on Failure Process of Heterogeneous Brittle Materials." Key Engineering Materials 324-325 (November 2006): 315–18. http://dx.doi.org/10.4028/www.scientific.net/kem.324-325.315.
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Rock and concrete are typical heterogeneous material that the meso-scale heterogeneity may have a significant effect on their macro-scale mechanical responses. In this work, a digital image-based (DIB) technique is employed to characterize and quantify the heterogeneity of concrete, and the obtained data is directly imported into a numerical code named RFPA (Rock Failure Process Analysis) to study the effect of heterogeneity on the failure process of concrete. The upgraded RFPA is capable to simulate the progressive failure of brittle materials such as rock and concrete, representing both the growth of existing fractures and the formation of new fractures, obviating the need to identify crack tips and their interaction explicitly. The simulated results are in reasonable agreement with experimental measurements and phenomenological observations reported in previous studies.
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Tang, X. W., Y. D. Zhou, and Y. L. Liu. "Factors Influencing Quasistatic Modeling of Deformation and Failure in Rock-Like Solids by the Smoothed Particle Hydrodynamics Method." Mathematical Problems in Engineering 2013 (2013): 1–13. http://dx.doi.org/10.1155/2013/852875.
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As a Lagrangian mesh-free numerical method, the Smoothed Particle Hydrodynamics (SPH) method has been traditionally applied for modeling astrophysics, fluid flows and thermal problems, and there has been a growing interest in applying SPH to solid deformation problems. However, the potential of this method for quasistatic analysis of rock-like brittle materials has not been clearly explored. The major aim of this paper is to investigate the effects of key factors in SPH on the load-deformation response of rock-like solids, including variations in the particle approximation theory, the magnitude of the smoothing length and its variable method. Simple uniaxial compression (UC) loading conditions were chosen, and a series of numerical studies were carried out sequentially on an idealized elastic case and an actual test of marble material. Typical results of the axial stress-strain response from infinitesimal to finite deformation as well as the progressive failure process for the marble tests are given and the influences of various factors are discussed. It is found that only provided proper choices of particle momentum equation and the smoothing length parameter, the SPH method is capable for favorably reproducing the deformation and progressive failure evolution in rock-like materials under quasistatic compression loads.
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Ben Ayed, Ines, Naomie Castor-Guyonvarch, Souad Amimour, Salma Naija, Chirine Aouichaoui, Sana Ben Omor, Zouhair Tabka, and Farid El Massioui. "Acute Exercise and Cognitive Function in Alzheimer’s Disease." Journal of Alzheimer's Disease 82, no. 2 (July 21, 2021): 749–60. http://dx.doi.org/10.3233/jad-201317.
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Background: Many studies have shown the impact of acute aerobic exercises (AAE) on cognition in healthy adults or at a pre-dementia stage. Few studies, however, have explored the positive effects of AAE in moderate Alzheimer’s disease (ADM) patients. Objective: Evaluating the effect of AAE on cognitive functions in ADM patients. Methods: Overall, 79 (age: 69.62±0.99) ADM patients were recruited. Participants were divided into three groups according to the task: aerobic exercises done alone or combined with cognitive games presented on a screen, and a control group who performed a reading task. The aerobic exercise protocol consisted of a 20-min cycling exercise of moderate intensity, corresponding to 60%of the individual target maximal heart rate recorded in a 6-minute walking test. The participants’ cognition was monitored before and after the intervention using the Tower of Hanoi, Digit Span, and Stroop tasks. Results: After the exercise, the participants’ attention in both the physical and combined groups improved for the Stroop, the forward and backward Digit Span tasks, as well as the time taken to solve the Tower of Hanoi, although no significant differences were found in the number of moves taken in the latter. By contrast, the control group did not show any significant improvement for most of the cognitive tasks after the reading session. Conclusion: Current evidence suggests that AAE may help to improve cognitive functions in ADM patients. This improvement is enhanced when the exercise is combined with cognitive games. Safe and progressive types of exercises should be promoted among ADM patients.
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Ding, Wenqi, Shi Tan, Rongqing Zhu, He Jiang, and Qingzhao Zhang. "Study on the Damage Process and Numerical Simulation of Tunnel Excavation in Water-Rich Soft Rock." Applied Sciences 11, no. 19 (September 24, 2021): 8906. http://dx.doi.org/10.3390/app11198906.
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The weakening effect is one of the most important causes triggering large deformation and failure of soft-rock engineering; however, few studies paid attention to damage evolution and constitutive relationship of rock in tensile damage in the excavation unloading and water-weakening process, not to mention the coupling process of unloading and water-weakening. In this paper, the mechanism and engineering characteristics of unloading softening and water-softening of water-rich soft rock are analyzed and summarized. Then with the aid of the strain equivalent principle, the damage of surrounding rock caused by unloading softening and water-softening is coupled, and the compression shear damage and the tensile damage of surrounding rock under the unloading process are analyzed. A damage constitutive model of rock subjected to excavation unloading and water-weakening is proposed considering the influence of water immersion time, and the proposed model is applied in a newly established finite element simulation method, which is suitable for excavation in the water-rich soft rock. Based on the mechanical-hydraulic-damage coupled method, the progressive failure process of surrounding rock under the dual softening effects can be reflected by the deteriorated parameters of damage elements. Finally, the field monitoring data of a typical section in the Xujiadi tunnel is used to verify the applicability and accuracy of the proposed dual softening model and simulation method.
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Wang, Shan Yong, S. K. Au, K. C. Lam, and Chun An Tang. "Numerical Study of Elastic-Brittle Failure of Notched Openings in Rocks." Key Engineering Materials 297-300 (November 2005): 2605–11. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.2605.
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Borehole breakout is the process by which portions of borehole or tunnel wall fracture or spall when subjected to compressive stresses. The stress-strain characteristics of rock during loading and unloading confining pressure are studied firstly. To overcome the difficulties in analytical model studies, a numerical code, RFPA2D (Rock Failure Process Analysis), developed by CRISR, Northeastern University, China, is used to investigate the progressive failure of breakout around tunnel. The heterogeneity of rock was also taken into account in the software. The numerical simulation reproduces the formation notch in rocks by the growth, interaction and coalescence of randomly distributed macrocracks. It is illustrated from the numerical simulated results that breakout direction of tunnel is parallel with the minor stress tensor in the plane perpendicular to the borehole axis. Specifically due to the inclusion of heterogeneity, some peculiarities are studied both in the evolution of fracture and the influence of borehole on the peak intensity of specimen as well as the AE event patterns.
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St John, Graham. "Civilised Tribalism: Burning Man, Event-Tribes and Maker Culture." Cultural Sociology 12, no. 1 (November 1, 2017): 3–21. http://dx.doi.org/10.1177/1749975517733162.
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Otherwise known as Black Rock City, Burning Man is an artistic event, that, mounted annually in Nevada’s Black Rock Desert, has become the inspiration for a global cultural movement. While it has been the subject of considerable attention from ethnographers and sociologists, Burning Man has persistently resisted classification. In this article, I undertake a tentative approach to Burning Man via a concept integral to Maffesoli’s postmodern social philosophy popular within Anglophone sociology: the neo-tribe. Ethnographic attention to Burning Man illustrates spectacular aspects of neo-tribalism. It is cyclical, immediate, sensual, enchanted, collaborative and offers multiple sites of belonging for participants, many of whom will self-identify as ‘tribal’ or ‘neo-tribal’. And yet Burning Man is also demonstrative of an optimising modernist ‘project’ complicating, if not incongruent with, postmodern tribalism. With Black Rock City theme camps, art projects and build teams echoing a design-orientated maker culture, and an organisation – the Burning Man Project – dedicated to propagating and scaling (making) the ethical, civic and progressive dimensions of this culture, this article demonstrates the paradoxical proclivities of Burning Man’s tribal character. The objective of the article is to forge a fuller understanding of Burning Man and other ‘transformational’ events illustrative of an alternative tribalism, and to explore ways the phenomenon both approximates and deviates from Maffesoli’s thesis.
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He, Feng, Zhenwei Wang, Yangfeng Zhao, Gaofeng Song, and Bowen Liu. "Experimental Investigations on Electrical Charge of Precracked Rock Specimens under Uniaxial Compression." Shock and Vibration 2020 (October 30, 2020): 1–9. http://dx.doi.org/10.1155/2020/8861030.
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The electrical charge characteristic of rock materials under compression is an important index for predicting the development of rock fractures and the failure of engineering structures. However, the charge behaviours of a preexisting rock sample have not been studied in depth. In this study, sandstone samples with a single fabricated precrack at different angles of inclination are prepared. The uniaxial compression tests are performed to study the charge behaviours associated with the initiation and propagation of secondary cracks, the mechanical properties, and the progressive failure of stressed rock samples. An improved analytical model based on the maximum tensile stress failure theory for brittle materials is also proposed for determining the crack growth paths of the single precrack rock samples under uniaxial compression. The friction factors of crack surfaces are computed. The results show that the step functions on the curves of charge accumulation over time correspond to the fluctuation of stress, indicating the initiation of microcracks. The sample with a crack inclination angle of π / 4 shows the largest amount of both the first charge and the total accumulation. The analytical model shows a positive relationship between the crack face friction factors and the charge accumulation. The analytical solution of the crack development angles shows good agreement with the experimental results. This work may provide reference for the similar studies regarding the correlation of charging behaviours to the compressed rock materials.
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Versaci, A., A. Lo Cascio, L. R. Fauzìa, and A. Cardaci. "STUDIES FOR THE CONSERVATION AND VALORISATION OF THE ARCHAEOLOGICAL ROCK HERITAGE OF CALASCIBETTA IN SICILY, ITALY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIV-M-1-2020 (July 24, 2020): 311–18. http://dx.doi.org/10.5194/isprs-archives-xliv-m-1-2020-311-2020.
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Abstract. The rock settlement of Vallone Canalotto, which stands in the valleys surrounding the town of Calascibetta – about three kilometres north from Enna, Sicily, Italy – testify to a widespread population of the area from prehistoric times up to the Middle Ages, probably linked to the agricultural and pastoral exploitation of its fertile land. This valuable heritage, dug into very soft limestone banks, is now threatened by significant erosion and disruption phenomena, which, in the absence of adequate safeguarding and maintenance actions, will lead to a progressive loss of material and the consequent collapse of some portions, making the documentable traces more and more paltry. The archaeological complex demonstrates the continuity of the funerary use from the remotest ages to the early Christian era, as testified by the excavation of rupestrian columbaria. In the early medieval period, small rural communities used the hypogeal structures for residential and religious purposes. In the present work, integrated procedures have been put in place for the 3D documentation of these artefacts, whose effectiveness has already been tested by the same team in other Sicilian rock sites. The research aims at the knowledge and cataloguing of places, which are important for the Island’s history but to date only marginally explored. It intends to stimulate and plan adequate conservation and enhancement activities. To improve the attendance of the sites, design proposals have been developed to guarantee greater accessibility to the archaeological areas and their understanding by visitors.
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Hill, Sarah. "Ending it all: Genesis and Revelation." Popular Music 32, no. 2 (May 2013): 197–221. http://dx.doi.org/10.1017/s0261143013000044.
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AbstractBecause of their brevity, many pop songs of the last 50 years seemingly elude the application of narrative theory. But the deliberate lengthening of individual tracks during the early years of progressive rock exposes them to precisely that kind of examination. One such song is ‘Supper's Ready’, which closes the 1972 Genesis album Foxtrot. This allegorical 23-minute epic, abundant with references to the Book of Revelation, provides an intriguing model for the ‘concept song’, and confounds the listener's expectations – lyrical, musical, narrative, structural and temporal. In this article I explore the seven tableaux of ‘Supper's Ready’, paying particular attention to the treatment of the apocalyptic theme, apply formalist and narrative theories of interpretation, and consider ways in which the song's design demands that the listener engage with both its concept and its construction.
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Gounden, P. "Progressive resistive loading on accessory expiratory muscles in tetraplegia." South African Journal of Physiotherapy 46, no. 4 (November 30, 1990): 4–15. http://dx.doi.org/10.4102/sajp.v46i4.778.
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To investigate the effects of progressive resistive loading on accessory expiratory muscles in tetraplegia, 40 such patients undergoing standard pulmonary rehabilitation were randomly assigned to control (n = 20) and experimental (n = 20) groups. In total there were 8 women and 32 men with an average age of 31 years. Their lesions were between the fifth and eighth cervical segments. The majority of the patients sustained their injury during motor vehicle accidents.Prior to training, measurements of maximum expiratory mouth pressure and vital capacity were obtained from each group. The experimental group underwent eight weeks of training. The training involved the use of the PFLEX muscle trainer which allowed the patient to expire against a predetermined resistance. The initial resistive load was set at a level equivalent to 60 percent of the patient’s maximum expiratory mouth pressure. Each subject was required to train for half an hour each day for six days a week. The resistive load was increased at two weekly intervals to ensure optimal loading throughout the training period the control group was excluded from any form of strenuous training but continued with the standard pulmonary care which involved conventional breathing exercises and assistance in coughing.The eight weeklong course of progressive resistive loading on accessory expiratory muscle showed a significant improvement in mean vital capacity from 1.48 L to 1.98 L (p = 0.0001) and a dramatic improvement in mean expiratory muscle strength from 43.76 cmH20 to 68 cmH2o) (p = 0.0001). Comparison of the values in the control group which were obtained eight weeks apart, showed no significant changes.The present finding that expiratory muscle strength in tetraplegics can be improved with specific training has important therapeutic implications. The increased PEmax should enable these subjects to generate higher intrathoracic pressure swings during coughing.Long term controlled studies should now be performed to determine the effects of this procedure on the clearance of bronchial secretions in such subjects.
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Emig, Mallory, Tikku George, Justin K. Zhang, and Momina Soudagar-Turkey. "The Role of Exercise in Parkinson’s Disease." Journal of Geriatric Psychiatry and Neurology 34, no. 4 (July 2021): 321–30. http://dx.doi.org/10.1177/08919887211018273.
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Parkinson’s disease (PD) is a progressive, neurodegenerative disorder of the central nervous system. While it primarily affects motor function, patients eventually develop non-motor symptoms including depression, anxiety, and eventually dementia. Although there is currently no cure, treatment is aimed largely at improving quality of life though medication or surgical techniques to reduce motor symptoms. However, there is vast evidence of the benefits of physical activity as adjunct therapy for Parkinson’s disease. In this review, we analyze 31 studies or reviews and highlight the role of exercise and rehabilitation in PD treatment. This study serves to provide clinicians with a comprehensive resource of the wide variety of exercises with proven benefit for patients affected by Parkinson’s disease. Specifically, patients report significant improvements in motor function, cognition, mood and sleep habits.
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Hanson, Kelly. "The Plastic People of the Universe and Utopian Performance in Tom Stoppard's Rock ‘n’ Roll." Theatre Survey 57, no. 3 (August 10, 2016): 358–79. http://dx.doi.org/10.1017/s0040557416000326.
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Tom Stoppard's 2006 play Rock ‘n’ Roll revolves around the story of the Plastic People of the Universe (1968–88), an underground Czech rock band best known in the United States for their connections to Václav Havel and possibly for their ties to the Velvet Revolution of 1989 and the fall of communism in the Eastern bloc. Often tangentially referred to in progressive Western journalism, the Plastic People have come to signify a kind of subcultural capital for mainstream bourgeois writers, a way for moderate Western liberals to appear edgy and cultured. Stoppard's play draws on this popular consumption of the Plastic People, fetishizing them both for their grungy, underground lifestyle and for their status as underground rock legends. After all, the play seems to ask, how many rock bands can claim to have started an actual revolution? The play's twin narratives dramatize the clash between rock music and philosophical Marxism in Cambridge and Prague from 1968 to 1990. The stories are linked through the protagonist, Jan, a Czech intellectual who abandons his studies at Cambridge to return to Czechoslovakia in the wake of the Soviet invasion of 1968. He is determined to “save” rock music, socialism, and his mother. Jan soon discovers the Plastic People of the Universe, whose music he holds up as a positive ray of light in the dreary decades preceding the Velvet Revolution. Placing the Plastics’ music and story alongside the work of male rock megastars such as the Rolling Stones, Pink Floyd, the Beach Boys, and Bob Dylan, Stoppard celebrates the Plastic People as a band that preserves the revolutionary roots of rock music.
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Eberhardt, Erik. "Twenty-ninth Canadian Geotechnical Colloquium: The role of advanced numerical methods and geotechnical field measurements in understanding complex deep-seated rock slope failure mechanisms." Canadian Geotechnical Journal 45, no. 4 (April 2008): 484–510. http://dx.doi.org/10.1139/t07-116.
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The underlying complexity associated with deep-seated rock slope stability problems usually restricts their treatment to phenomenological studies that are largely descriptive and qualitative. Quantitative assessments, when employed, typically focus on assessing the stability state but ignore factors related to the slope’s temporal evolution including rock mass strength degradation, internal shearing, and progressive failure, all of which are key processes contributing to the final collapse of the slope. Reliance on displacement monitoring for early warning and the difficulty in interpreting the data without a clear understanding of the underlying mechanisms has led to a situation where predictions are highly variable and generally unreliable. This paper reviews current knowledge regarding prefailure mechanisms of massive rock slopes and current practices used to assess the hazard posed. Advanced numerical modelling results are presented that focus on the importance of stress- and strain-controlled rock mass strength degradation leading to failure initiation. Efforts to address issues related to parameter and model uncertainty are discussed in the context of a high alpine research facility, the “Randa In Situ Rockslide Laboratory”, where state-of-the-art instrumentation systems and numerical modelling are being used to better understand the mechanisms controlling prefailure deformations over time and their evolution leading to catastrophic failure.
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Crippa, Chiara, Elena Valbuzzi, Paolo Frattini, Giovanni B. Crosta, Margherita C. Spreafico, and Federico Agliardi. "Semi-automated regional classification of the style of activity of slow rock-slope deformations using PS InSAR and SqueeSAR velocity data." Landslides 18, no. 7 (April 6, 2021): 2445–63. http://dx.doi.org/10.1007/s10346-021-01654-0.
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AbstractLarge slow rock-slope deformations, including deep-seated gravitational slope deformations and large landslides, are widespread in alpine environments. They develop over thousands of years by progressive failure, resulting in slow movements that impact infrastructures and can eventually evolve into catastrophic rockslides. A robust characterization of their style of activity is thus required in a risk management perspective. We combine an original inventory of slow rock-slope deformations with different PS-InSAR and SqueeSAR datasets to develop a novel, semi-automated approach to characterize and classify 208 slow rock-slope deformations in Lombardia (Italian Central Alps) based on their displacement rate, kinematics, heterogeneity and morphometric expression. Through a peak analysis of displacement rate distributions, we characterize the segmentation of mapped landslides and highlight the occurrence of nested sectors with differential activity and displacement rates. Combining 2D decomposition of InSAR velocity vectors and machine learning classification, we develop an automatic approach to characterize the kinematics of each landslide. Then, we sequentially combine principal component and K-medoids cluster analyses to identify groups of slow rock-slope deformations with consistent styles of activity. Our methodology is readily applicable to different landslide datasets and provides an objective and cost-effective support to land planning and the prioritization of local-scale studies aimed at granting safety and infrastructure integrity.
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Ramos, Ayrton Moraes, Gilmar Weber Senna, Estevão Scudese, Estélio Henrique Martin Dantas, Marzo Edir da Silva-Grigoletto, Jordan David Fuqua, and Emerson Pardono. "CARDIOVASCULAR AND STRENGTH ADAPTATIONS IN CONCURRENT TRAINING IN HYPERTENSIVE WOMEN." Revista Brasileira de Medicina do Esporte 25, no. 5 (October 2019): 367–71. http://dx.doi.org/10.1590/1517-869220192505200493.
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ABSTRACT Introduction Physical exercise has been recommended as a non-pharmacological strategy for preventing and controlling hypertension. Objective To verify chronic cardiovascular and muscle strength adaptations in hypertensive women who underwent 12 weeks of concurrent training (CT) in different orders. Methods Twenty hypertensive women were randomly assigned into 2 groups: resistance exercise-endurance group (REE; 56.00 ± 5.20 years; 78.95 ± 8.28 kg; 155.10 ± 5.30 cm; 33.00 ± 5.30 kg.m-2) and endurance-resistance exercise group (ERE; 57.10 ± 13.38 years; 76.56 ± 18.87 kg; 155.50 ± 8.18 cm; 31.41 ± 5.84 kg.m-2). The endurance exercise was composed of 3 sets of 4 exercises, with 8-RM loads with a 90-second break between sets and exercises. The resistance exercise lasted for 25 minutes and was of progressive intensity. Muscle strength (8-RM), systolic and diastolic blood pressure, heart rate, and double product were assessed pre- and post-exercise. Results The ANOVA showed significant increases in strength for all exercises (p <0.0001) regardless of the order of the concurrent training (bench press, p = 0.680; leg press, p = 0.244; seated row, p = 0.668; and leg extension, p = 0.257). No significant differences in systolic (p = 0.074) and diastolic blood pressures (p = 0.064) were observed for different CT conditions. However, significant reductions in systolic (p = 0.0001) and diastolic blood pressures (p = 0.006) and double product (p = 0.006) only occurred in the REE group. Conclusion Endurance training and resistance exercise promote significant muscle strength gains after 12 weeks of training regardless of CT order in hypertensive women. Beneficial cardiovascular responses (SBP, DBP, and RPP) were also observed when endurance training was initiated. Level of evidence I; Therapeutic Studies - Investigating Treatment Outcomes.
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Lee, Banseok, Myeongcheol Shin, Youngjae Park, So-Yoon Won, and Kyoung Sang Cho. "Physical Exercise-Induced Myokines in Neurodegenerative Diseases." International Journal of Molecular Sciences 22, no. 11 (May 28, 2021): 5795. http://dx.doi.org/10.3390/ijms22115795.
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Neurodegenerative diseases (NDs), such as Alzheimer’s disease (AD), Parkinson’s disease (PD), Huntington’s disease (HD), and amyotrophic lateral sclerosis (ALS), are disorders characterized by progressive degeneration of the nervous system. Currently, there is no disease-modifying treatments for most NDs. Meanwhile, numerous studies conducted on human and animal models over the past decades have showed that exercises had beneficial effects on NDs. Inter-tissue communication by myokine, a peptide produced and secreted by skeletal muscles during exercise, is thought to be an important underlying mechanism for the advantages. Here, we reviewed studies about the effects of myokines regulated by exercise on NDs and their mechanisms. Myokines could exert beneficial effects on NDs through a variety of regulatory mechanisms, including cell survival, neurogenesis, neuroinflammation, proteostasis, oxidative stress, and protein modification. Studies on exercise-induced myokines are expected to provide a novel strategy for treating NDs, for which there are no adequate treatments nowadays. To date, only a few myokines have been investigated for their effects on NDs and studies on mechanisms involved in them are in their infancy. Therefore, future studies are needed to discover more myokines and test their effects on NDs.
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Mamot, Philipp, Samuel Weber, Saskia Eppinger, and Michael Krautblatter. "A temperature-dependent mechanical model to assess the stability of degrading permafrost rock slopes." Earth Surface Dynamics 9, no. 5 (September 9, 2021): 1125–51. http://dx.doi.org/10.5194/esurf-9-1125-2021.
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Abstract. Over the last 2 decades, permafrost degradation has been observed to be a major driver of enhanced rock slope instability and associated hazards in high mountains. While the thermal regime of permafrost degradation in high mountains has been addressed in several modelling approaches, no mechanical models that thoroughly explain rock slope destabilisation controls in degrading permafrost have been developed. Meanwhile, recent laboratory studies have shown that degrading permafrost affects both, rock and ice mechanical strength parameters as well as the strength of rock–ice interfaces. This study presents a first general approach for a temperature-dependent numerical stability model that simulates the mechanical response of a warming and thawing permafrost rock slope. The proposed procedure is exemplified using a rockslide at the permafrost-affected Zugspitze summit crest. Laboratory tests on frozen and unfrozen rock joint and intact rock properties provide material parameters for discontinuum models developed with the Universal Distinct Element Code (UDEC). Geophysical and geotechnical field surveys reveal information on permafrost distribution and the fracture network. This model can demonstrate how warming decreases rock slope stability to a critical level and why thawing initiates failure. A generalised sensitivity analysis of the model with a simplified geometry and warming trajectory below 0 ∘C shows that progressive warming close to the melting point initiates instability above a critical slope angle of 50–62∘, depending on the orientation of the fracture network. The increase in displacements intensifies for warming steps closer to 0 ∘C. The simplified and generalised model can be applied to permafrost rock slopes (i) which warm above −4 ∘C, (ii) with ice-filled joints, (iii) with fractured limestone or probably most of the rock types relevant for permafrost rock slope failure, and (iv) with a wide range of slope angles (30–70∘) and orientations of the fracture network (consisting of three joint sets). Here, we present a benchmark model capable of assessing the future destabilisation of degrading permafrost rock slopes.
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Egbunike, G. N., and J. A. Oluyemi. "COMPARATIVE STUDIES OF THE REPRODUCTIVE CAPACITY OF NIGERIAN AND EXOTIC POULTRY BREEDS." Nigerian Journal of Animal Production 6 (January 19, 2021): 47–51. http://dx.doi.org/10.51791/njap.v6i.2657.
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THE study involved 48 adult cocks from four breeds namely, White Rock (WR), Rhode Island Red (RIR), White Leghorn (WL) and Nigerian indigenous breed (NIB). They weighed between 1 -26kg at the beginning of the experiment. The WR cock had the heaviest paired testis Weight (25.06g) while NIB had the lightest (16.549). These weights accounted for 1.04% and 1.22% of the liveweight respectively while the specific gravity of the testis from these two breeds was 1.048. The volume (0.63ml vs 0.33ml) and progressive motility of the spermatozoa (63.34 vs 58.12%) were highest in the WR and lowest in the NIB while sperm concentration (3.03 vt 2.43 x 10') was highest also in the WR but lowest in the WL. These semen characteristics were significantly influenced by breed and time of ejaculation except with the volume in which the time effect was Insignificant. The WR semen had the lowest sperm abnormalities (10.13% while RIR had the highest (13.14%). The results however Indicate that the WR cocks ejaculated the largest quantity and best quality semen, followed in order by RIR, NIB and WL
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Кондратьева, Надежда, Nadezhda Kondrateva, Светлана Овчукова, Svetlana Ovchukova, Николай Кириллов, Nikolay Kirillov, Валерий Белов, Valeriy Belov, Роман Большин, and Roman Bol'shin. "PROGRESSIVE ELECTROTECHNOLOGIES FOR INCREASING PRODUCTIVITY OF ANIMALS." Vestnik of Kazan State Agrarian University 13, no. 2 (August 6, 2018): 114–17. http://dx.doi.org/10.12737/article_5b3508799af6e2.76526007.
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The article deals with the impact of various harmonic vibrations of the musical range on the productivity (yield) of farm animals. Intensification of animal husbandry is impossible without automation and mechanization of production. Along with this, the use of machine milking for cattle (cattle) often becomes another cause of mass animal diseases. For example, mastitis, along with numerous other causes, is often caused by milking machines, which because of their uniformity do not always correspond to both size and shape of the mammary gland of different cows. The relevance of this issue is increasing in connection with the intensification of modern livestock and the replacement of the relationship “man-animal” to the more rigid “man-machine-animal” relationship. At the same time, we must remember that the cow - a creature extremely pedantic, easily irritable, knows its milkmaid well, and it is only necessary to replace this milkmaid with another one, as I immediately begin to fall down. To reduce the stress state of cattle, it is possible to use, for example, classical music, which leads to an increase in the amount of milk in mammals. Together with this, under the influence of rock music, it drops sharply. This influence is explained by the fact that different ranges of acoustic harmonic oscillations resonate with different parts of the brain or organs of the body. We studied the influence of four types of musical works (tracks), differing from each other by the intensity of low, medium and high frequencies. These are works by P.I. Tchaykovskiy, A. Mozart, Indian tracks and works performed on the violin. Studies have shown that there is a difference in the milk yield obtained in the control, as well as in the use of musical works. The greatest effect was obtained using the works of A. Mozart, consisting in increasing the milk yield by 15 ... 18% compared with the control. The carried out technical and economic calculations confirmed the profitability of the proposed measures for the application of harmonic variations in the musical range to increase the productivity of Holstein cows.
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Zhou, Wei, Wei Yuan, Gang Ma, and Xiao-Lin Chang. "Combined finite-discrete element method modeling of rockslides." Engineering Computations 33, no. 5 (July 4, 2016): 1530–59. http://dx.doi.org/10.1108/ec-04-2015-0082.
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Purpose – The purpose of this paper is to propose a novel combined finite-discrete element method (FDEM), based on the cohesive zone model, for simulating rockslide problems at the laboratory scale. Design/methodology/approach – The combined FDEM is realized using ABAQUS/Explicit. The rock mass is represented as a collection of elastic bulk elements glued by cohesive elements with zero thickness. To reproduce the tensile and shear micro-fractures in rock material, the Mohr-Coulomb model with tension cut-off is employed as the damage initiation criterion of cohesive elements. Three simulated laboratory tests are considered to verify the capability of combined FDEM in reproducing the mechanical behavior of rock masses. Three slope models with different joint inclinations are taken to illustrate the application of the combined FDEM to rockslide simulation. Findings – The results show that the joint inclination is an important factor for inducing the progressive failure behavior. With a low joint inclination, the slope failure process is observed to be a collapse mode. As the joint inclination becomes higher, the failure mode changes to sliding and the steady time of rock blocks is shortened. Moreover, the runout distance and post-failure slope angle decrease as the joint inclination increases. Originality/value – These studies indicate that the combined FDEM performed within ABAQUS can simulate slope stability problems for research purposes and is useful for studying the slope failure mechanism comprehensively.
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McPhail, Graham. "Informal and formal knowledge: The curriculum conception of two rock graduates." British Journal of Music Education 30, no. 1 (July 2, 2012): 43–57. http://dx.doi.org/10.1017/s0265051712000228.
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Informal learning has become a prominent theme in music education literature in recent times. Many writers have called for a new emphasis on informal knowledge and pedagogy as the way forward for music education. The position taken in this paper is that a central issue for music education is the accommodation of a tension between types of knowledge and the ways of knowing strongly associated with popular and classical of music – socially acquired informal knowledge and socially developed but formally acquired disciplinary knowledge. Approaches to curriculum conception and realisation observed in a recent series of case studies in New Zealand secondary schools suggest that a key factor in student engagement is the degree to which teachers can create links between informal and formal knowledge so that students’ understanding and conceptual abilities can be extended across these knowledge boundaries. The teaching approaches of two recent graduates in rock music are discussed to support the social realist argument that a ‘progressive’ approach to curriculum involves creating links between informal and formal knowledge rather than replacing one with the other or dissolving the boundaries between them. Through seeing the two types of knowledge as necessarily interconnected within educational contexts, the epistemic integrity of classroom music is maintained. In this way students are able to recognise themselves and their aspirations while also recognising the potential and power of the foundational knowledge of the discipline.
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Ransdell, Lynda B., Heidi A. Wayment, Nanette Lopez, Cori Lorts, Anna L. Schwartz, Karen Pugliesi, Patricia S. Pohl, Dierdra Bycura, and Ricky Camplain. "The Impact of Resistance Training on Body Composition, Muscle Strength, and Functional Fitness in Older Women (45–80 Years): A Systematic Review (2010–2020)." Women 1, no. 3 (September 14, 2021): 143–68. http://dx.doi.org/10.3390/women1030014.
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As women age, they typically experience a progressive decrease in skeletal muscle mass and strength, which can lead to a decline in functional fitness and quality of life. Resistance training (RT) has the potential to attenuate these losses. Although well established for men, evidence regarding the benefits of RT for women is sparse and inconsistent: prior reviews include too few studies with women and do not adequately examine the interactive or additive impacts of workload, modalities, and nutritional supplements on outcomes such as muscle mass (MM), body composition (BC), muscle strength (MS), and functional fitness (FF). The purpose of this review is to identify these gaps. Thirty-eight papers published between 2010 and 2020 (in English) represent 2519 subjects (mean age = 66.89 ± 4.91 years). Intervention averages include 2 to 3 × 50 min sessions across 15 weeks with 7 exercises per session and 11 repetitions per set. Twelve studies (32%) examined the impact of RT plus dietary manipulation. MM, MS, and FF showed positive changes after RT. Adding RT to fitness regimens for peri- to postmenopausal women is likely to have positive benefits.
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Geirsdóttir, Áslaug, and Jón Eiríksson. "Growth of an Intermittent Ice Sheet in Iceland during the Late Pliocene and Early Pleistocene." Quaternary Research 42, no. 2 (September 1994): 115–30. http://dx.doi.org/10.1006/qres.1994.1061.
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AbstractDeep-sea paleoclimatic records show that the Quaternary climate around Iceland was, and probably still is, very sensitive to rapid shifts in North Atlantic oceanic circulation. Studies of several key sections in Iceland indicate that similar oscillations are reflected in the late Pliocene and early Pleistocene terrestrial stratigraphy. Correlations between six rock sequences in western, northern, eastern, and southern Iceland show a fairly distinct trend during the Pliocene-Pleistocene transition indicating the progressive growth of an ice sheet from southeast toward the north and west. The correlations are based on K/Ar dates and paleomagnetic studies. A total of 11 glacial horizons are recorded in a stratigraphic column from eastern Iceland extending back 6.5 myr. In western Iceland, 7 glacial horizons are preserved in a rock section dated from 7.0 to 1.8 myr, and in northern Iceland 14 glacial horizons are identified in a section that extends back to 9.0 myr. Well over 20 glacial horizons have been identified in the stratigraphic column in Iceland. Full-scale glacial-interglacial cyclicity with regional ice cover is indicated at approximately 2.6 myr. A further amplification leading to islandwide glaciations is identified at 2.2-2.1 myr. These results show that changes in the ice cover in Iceland correlate with the deep-sea oxygen isotope records from benthic and planktonic foraminifera as well as IRD studies from the North Atlantic.
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Olkhovik, Alina, Oleksandr Yurchenko, Olha Yezhova, Vladyslav Smiianov, Inna Mordvinova, Alla Yurchenko, Ivan Salatenko, and Olha Ihnatieva. "Applying Physical Therapy on Scleroderma Patients. A Clinical Case." Acta Balneologica 61, no. 4 (2019): 283–88. http://dx.doi.org/10.36740/abal201904111.
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Introduction: Scleroderma remains one of the most severe rheumatic diseases and is characterized by a progressive course, disability, and a high level of mortality. According to world statistics, the average disease incidence rate ranges from 0.6 to 19 per 1 million, spreading out – from 4 to 242 per 1 million. An early start of physical therapy with the inclusion of new techniques in conjunction with medical treatment remains topical. Aim: To develop and experimentally test the effectiveness of a complex physical therapy program for people with a limited form of scleroderma. Clinical case: The study involved a woman with a limited form of scleroderma. At the beginning and the end of the study, laboratory studies were conducted: the level of hemoglobin, ESR, ionized calcium, Scl-70 (ANA-Screen); clinical signs were investigated: swelling of the hands, Raynaud’s phenomenon, fibrous myopathy, skin tightening assessment (according to G. Rodnan), goniometric studies and manual muscle testing. Physical therapy consisted of: daily kinesiotherapy in the form of active-passive exercises with an emphasis on fine motor skills of fingers and active exercises for the temporomandibular joint, coniferous salt bath for wrists, therapeutic massage and Kinesio taping of wrists. As a result of the study, the mobility of the joints of the upper limbs increased by an average of 5-35 °; the muscle strength increased from 3 to 5 points and the quality of life of the patient improved. Conclusions: Physical therapy made it possible to improve the mobility of the wrist and metacarpophalangeal joints, increase muscle strength, and reduce the main manifestations of the disease. The continuation of physical therapy complex will improve the quality of life of these patients and the further prognosis of treatment.
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Chen, Lixian, Yun Cui, Bingyu Li, Jie Weng, Weiju Wang, Shuangshuang Zhang, Xuliang Huang, Xiaohua Guo, and Qiaobing Huang. "Advanced glycation end products induce immature angiogenesis in in vivo and ex vivo mouse models." American Journal of Physiology-Heart and Circulatory Physiology 318, no. 3 (March 1, 2020): H519—H533. http://dx.doi.org/10.1152/ajpheart.00473.2019.
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Proliferative diabetic retinopathy (PDR) is a progressive disease predominantly involving pathological angiogenesis and is characterized by the development of immature, fragile, and easily hemorrhagic new vessels. Advanced glycation end products (AGEs) and the receptor for AGEs (RAGE) play important roles in the progression of diabetic retinopathy. Our previous studies demonstrated that AGEs promoted HUVEC angiogenesis by inducing moesin phosphorylation via RhoA/Rho-associated protein kinase (ROCK) pathway. The aim of this study was to further confirm AGE-induced angiogenesis in vivo and the involvement of RAGE, ROCK, and moesin phosphorylation in this process. We performed the study in an AGE-treated mouse model with various angiogenesis assays in multiple in vivo and ex vivo models. The results demonstrated that AGEs promoted significant neovascularization in whole mount retina and mouse aortic ring of adult and postnatal mice and in Matrigel plug as well, which were consistently accompanied by increased moesin phosphorylation. The increase of AGE-evoked neovascularization and moesin phosphorylation were both attenuated by RAGE knockout or ROCK inhibitor Y27632 administration in mice. We also revealed the pathological characteristics of AGE-promoted angiogenesis by demonstrating the decrease of pericyte coverage and the disarranged endothelial alignment in microvessels. In conclusion, this study provides in vivo evidences that AGEs induce immature angiogenesis by binding to RAGE, activating the RhoA/ROCK signal pathway and inducing moesin phosphorylation. NEW & NOTEWORTHY Advanced glycation end product (AGE)-induced formation of neovessels and phosphorylation of moesin in retina and aortic ring required AGE receptors. AGEs increased neovessels and the phosphorylation of moesin in retina and aortic ring via RhoA/ROCK pathway. AGE-induced immature angiogenesis in AGE-treated mouse retina and aortic ring. The AGE-RAGE axis and moesin could be candidate targets for overcoming relative diseases.
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Sava, Mihai, Maria-Gabriela Catană, and Corina Roman-Filip. "The importance of early neurorehabilitation in the recovery of post-vaccination Guillain-Barre syndrome – a case report." Balneo Research Journal 10, no. 10.2 (May 20, 2019): 98–102. http://dx.doi.org/10.12680/balneo.2019.246.
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Abstract Guillain-Barre syndrome (GBS) is the most common cause of acute flaccid paralysis worldwide, having an incidence of about 1/100,000 across several studies in a number of countries. We present the case of a 60-year-old female patient, with known hypertension, admitted to our department for paresthesia and muscle weakness predominantly in the distal upper and lower limbs. Symptomatology had an acute onset after 14 days from influenza vaccine administration. Lumbar puncture revealed CSF glucose (91 mg/dl), CSF protein (0.508 g/l) and no pleocytosis. Electromyography supported the presumptive diagnosis of polyradiculoneuritis. The patient underwent three sessions of double filtration and the final diagnosis was Guillain-Barre polyradiculoneuritis secondary to influenza vaccination. Approximately 80% of patients with polyradiculoneuritis recover completely within a few months to one year; however, 5-10% of these patients experience one or more recurrences. It should be emphasized that acute-phase rehabilitation must start immediately and include an individualized program of gentle strengthening, and manual resistive and progressive resistive exercises. Key words: polyradiculoneuropathy, influenza vaccine, neurorehabilitation,
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Galea, Mary P. "Does respiratory muscle training improve respiratory function compared to sham training, no training, standard treatment or breathing exercises in children and adults with neuromuscular disease? A Cochrane Review summary with commentary." NeuroRehabilitation 48, no. 2 (March 9, 2021): 243–45. http://dx.doi.org/10.3233/nre-218000.
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BACKGROUND: Progressive muscle weakness is a feature of neuromuscular diseases (NMDs), a heterogeneous group of conditions with variable onset, presentation and prognosis that affect both children and adults. Respiratory muscle weakness compromises respiratory function and may lead to respiratory failure. OBJECTIVE: To assess the effects of respiratory muscle training (RMT) in adults and children with NMD. METHODS: A Cochrane Review by Silva et al. was summarized with comments. RESULTS: Eleven studies involving 250 randomized participants with NMD were included. While the studies showed that RMT may lead to improvements in lung function and respiratory muscle strength in people with ALS and DMD, this was not a consistent finding. The evidence from all the included trials was of low or very low certainty. CONCLUSIONS: There may be some improvement in lung capacity and respiratory muscle strength following RMT in some NMD. There appears to be no clinically meaningful effect of RMT on physical functioning and quality of life in ALS. The low certainty of the evidence means that the results need to be interpreted with caution.
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Lundberg, Mattias. "Motivic cohesion and parsimony in three songs from Gentle Giant's Acquiring the Taste (1971)." Popular Music 33, no. 2 (April 8, 2014): 269–92. http://dx.doi.org/10.1017/s0261143014000257.
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AbstractIn addition to a hierarchy of harmony and fundamental pitch, large-scale modal or tonal music generally needs to generate considerable portions of its substance from a limited number of melodic ideas in order to be readily comprehended as musical form. In Western musical tradition this has typically been achieved by means of motivic development. A distinctive trait in the mainstream of popular music in the 1960s and 1970s, on the other hand, is the predominance of clearly demarcated phrase-bound structures, where either no smaller unit than the phrase could be perceived, or where the smaller units (as in the case of riffs and ostinato figures) have functions that are subservient or complementary to the phrase-structure. Some genuine exceptions from this otherwise highly dominant tendency can be identified in the music from the so-called progressive rock movement in the early 1970s. This article investigates the case of the British group Gentle Giant (active 1970–1980). A motivic analysis of three songs from the album Acquiring the Taste (1971) elucidates how a small set of motives could be used in concatenations to unify larger and more dynamic song structures than what is possible in non-reducible phrase-bound forms.
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Castán Broto, Vanesa. "Beyond tabulated utopias: Action and contradiction in urban environments." Urban Studies 57, no. 11 (May 27, 2020): 2371–79. http://dx.doi.org/10.1177/0042098020919084.
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In this commentary I reflect upon the possibilities for action to deliver sustainable and just urban environments. I depart from the questions that inspire this special issue: what is it about cities that enables them to make a substantial contribution to environmental dilemmas? And how did cities become the darling trope of the international environmental policy regime? I use the metaphor of ‘the Crystal Palace’ to situate proposals for sustainable urbanism in a spectrum of options between naïve idealism and full-fledged cynicism. I argue that between those two extremes there are multiple alternatives to advance sustainable futures. Urban political ecology (UPE) is in a privileged position to reveal the contradictions inherent in the current incarnation of sustainable urbanism. That is why UPE scholars cannot miss the opportunity to produce context-relevant research to change urban sustainability policies and beliefs. In the second part of this commentary, I explore a case study already presented elsewhere in the special issue. The case of the successive unsuccessful projects for Olympic candidacy in Jaca (Spain) shows the impact of a series of speculative design exercises to build a technocratic eco-city. However, Jaca’s Olympic dreams have historical and cultural roots in the town. Its inhabitants have both propelled and contested the Olympic project at different moments over the evolution of the project. Progressive forms of environmentalism also emerge from the encounter between urban history and utopian thinking.
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Niemz, Peter, Simone Cesca, Sebastian Heimann, Francesco Grigoli, Sebastian von Specht, Conny Hammer, Arno Zang, and Torsten Dahm. "Full-waveform-based characterization of acoustic emission activity in a mine-scale experiment: a comparison of conventional and advanced hydraulic fracturing schemes." Geophysical Journal International 222, no. 1 (May 1, 2020): 189–206. http://dx.doi.org/10.1093/gji/ggaa127.
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SUMMARY Understanding fracturing processes and the hydromechanical relation to induced seismicity is a key question for enhanced geothermal systems (EGS). Commonly massive fluid injection, predominately causing hydroshearing, are used in large-scale EGS but also hydraulic fracturing approaches were discussed. To evaluate the applicability of hydraulic fracturing techniques in EGS, six in situ, multistage hydraulic fracturing experiments with three different injection schemes were performed under controlled conditions in crystalline rock at the Äspö Hard Rock Laboratory (Sweden). During the experiments the near-field ground motion was continuously recorded by 11 piezoelectric borehole sensors with a sampling rate of 1 MHz. The sensor network covered a volume of 30×30×30 m around a horizontal, 28-m-long injection borehole at a depth of 410 m. To extract and characterize massive, induced, high-frequency acoustic emission (AE) activity from continuous recordings, a semi-automated workflow was developed relying on full waveform based detection, classification and location procedures. The approach extended the AE catalogue from 196 triggered events in previous studies to more than 19 600 located AEs. The enhanced catalogue, for the first time, allows a detailed analysis of induced seismicity during single hydraulic fracturing experiments, including the individual fracturing stages and the comparison between injection schemes. Beside the detailed study of the spatio-temporal patterns, event clusters and the growth of seismic clouds, we estimate relative magnitudes and b-values of AEs for conventional, cyclic progressive and dynamic pulse injection schemes, the latter two being fatigue hydraulic fracturing techniques. While the conventional fracturing leads to AE patterns clustered in planar regions, indicating the generation of a single main fracture plane, the cyclic progressive injection scheme results in a more diffuse, cloud-like AE distribution, indicating the activation of a more complex fracture network. For a given amount of hydraulic energy (pressure multiplied by injected volume) pumped into the system, the cyclic progressive scheme is characterized by a lower rate of seismicity, lower maximum magnitudes and significantly larger b-values, implying an increased number of small events relative to the large ones. To our knowledge, this is the first direct comparison of high resolution seismicity in a mine-scale experiment induced by different hydraulic fracturing schemes.
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MIŠČENKO, Olga. "The Importance of a Teacher in a Distance Education and the Progressive Methods of Teaching in a Virtual Learning Environment." Coactivity: Philology, Educology 22, no. 2 (December 19, 2014): 97–104. http://dx.doi.org/10.3846/cpe.2014.241.
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The purpose of the article is to analyze the experience of the first work years of teaching the students, who study by distance, to compare other authors’ experience and to examine the advantages of Moodle virtual learning environment (VLE), searching for new applications of it. The relevance of e-learning is noted. It is affirmed that metacognitive learning strategies are typical for learning foreign languages in virtual environment. It is said that the Internet is a tool that ensures studies by distance. It is said that raising the qualification and learning by distance allows a responsible employee to improve foreign language skills while lifelong learning. VLE adaptability for teaching and studying English is being discussed. It is stated that the Internet conditions all types of methods in the virtual environment, application, and its existence expands and deepens the learning approach. In the paper it is claimed that the Moodle VLE function is to improve the learning process to ensure a high level of expertise and the objectivity of assessment. Studying in conventional way and in the virtual environment are briefly compared. Moodle virtual learning environment application objectives to learning outcomes, emphasizing the importance of the traditional teaching methods, the student’s responsibility to call attention to the learning process and system characteristics are defined. It is noted that learning in the virtual environment is based on the principles of epistemology, therefore the Moodle system meets the didactic tasks. The virtual learning environment possibilities ensure a very good feedback and increase students’ motivation, and, consequently, that provides better knowledge. It is emphasized that while teaching by distance, the teacher’s responsibility, his role in the development of educational material and the course tasks have increased. Some specific cases for various forms of studies and exercises to perform in the Moodle e-system are given. Some statistical data demonstrate the improvement of the quality of knowledge due to the Moodle system application for training foreign language.