Dissertations / Theses on the topic 'Moral decay'

School leaders are faced with serious moral challenges on a daily basis at schools, which often result in them making poor moral choices. In a situation of moral decay in schools, reports in the news media create the impression that school leaders often fail to demonstrate the necessary values advocated by the Moral Regeneration Movement and the Manifesto of Values, Education and Democracy. The purpose of this qualitative study was to explore school leaders’ understanding and reasoning regarding values and morality. For the purposes of the study a number of possible lenses, such as cultural relativism, religious beliefs, ethical subjectivism, classical utilitarian theory, Domain theory, and the ethic of justice, ethic of care, ethic of critique and the ethic of community, were identified and used in analysing the way school leaders reason about moral dilemmas. A design located within hermeneutic phenomenology was used in the study with the aim to understand school leaders’ understanding and reasoning regarding values and morality. A combination of quantitative and qualitative data gathering techniques was used in a concurrent mixed method design using a single questionnaire. The sample for the study consisted of educators enrolled for a formal management training programme. This group was largely homogenous in terms of religion, language, culture and was mainly from rural areas of Mpumalanga. Seventy-three participants took part in the study. It emerged from the data that the espoused theories used by school leaders could be related to the lenses identified in the literature. The school leaders’ espoused theories were mainly based on the ethic of justice and the ethic of care and were aligned to their preferred value orientations. At the espoused theory level, school leaders revealed a strong moral orientation. Further research is indicated to study school leaders’ theory in action.
Dissertation (MEd)--University of Pretoria, 2010.
Education Management and Policy Studies
unrestricted

This thesis seeks to be an answer, to the unanswered questions. The writer tries to page back, and find out that which is lost in human kind. The writer tries to find out society in which he was born and nurtured. A society characterised by good morals, virtues, good standards and culture. Something is lost in humanity. What is that? - Morality. The present society seems to contradict the latter society. The present lifestyle seemed to have no morals. If they do, they must have inherited from somewhere. They see to have lost respect for other people's property etc. South Africa's, new dispensation seemed to have eroded Ubuntu away. I am trying to recapture, revive, relive, and resuscitate morality back in the agenda of every South African. How? Moral regeneration is the vision or dream of the South African Deputy President. But I believe it has taken a wrong direction. Politicians cannot lead moral regeneration. Instead the church must lead it, because the church has the spirituality. The answer to moral decay is in the church. The church need to teach, rebuke and lead by example on morality. It shall not compromise its gospel of Jesus Christ. Today, South Africa is facing a serious crisis of sexuality, unfaithfulness in marriages, corruption, unemployment, HIV Aids etc. morality is the broad concept,and in this thesis I've confirmed myself In addressing: sexuality, marriage unfaithfulness and corruption. Moral regeneration can be realised in this country, the church can address unfaithfulness in marriages, sexuality and corruption vigorously. Parliament cannot legislate on these issues. But the church can consciously teach people responsibilities coupled with democracy. Zeerust, is the small town in the North West Province. I have chosen to write this thesis from Zeerust context. The reason being, I have pastoral oversight of Methodist people in Zeerust and surrounding villages. Zeerust shares the same problems the country is facing that of corruption, sexuality and unfaithfulness in marriages. Lastly, the church needs to take seriously the cultural factors of its indigenous people. Before we became Christians, we were Africans. The church must be ready to learn from people's cultures, and the way they kept moral uprightness. Dialogue and consultations is a dire need between the church and the culture, between theologians and African healers. This thesis says the church is the answer to moral regeneration.
Dissertation (MA(Theol))--University of Pretoria, 2004.
lk2013
Practical Theology
MA(Theol)

This thesis utilizes an historical sociology approach to examine women’s organizations in Canada between 1930 and 1955. I consider their responses to changes in women’s lives among three key areas: birth control, sex education and motherhood in the context of macro level events in Canadian society. This research utilizes a moral regulation framework to consider the ways in which the discourses, images and programmes of women’s organizations such as the National Council of Women and the Women’s Institutes created a space for norm-based adaptations to women’s intimate lives during the mid-twentieth century in Canada.

The main aim of this study was to investigate the prophetic calling of the Reformed Churches in South Africa (RCSA) in the moral regeneration of the South African urban community. The method of research followed in this study was to study primary and secondary sources, as well as appropriate biblical teachings and theological principles relevant to this study and to systematise the information. An analysis was provided of the main problems regarding moral decay besetting the South African urban community and the main challenges this moral decay poses for the RSCA were identified. A strategy the RCSA should implement in tackling these challenges was devised and a number of practical projects the RCSA could undertake at congregational level to concretise the strategy were discussed. The study confirmed that the Church has an important role to play as the driving agent for moral regeneration of the South African urban community. It was pointed out that the moral regeneration of the urban community in South Africa cannot be left to the government. The main reason is that morality cannot be legislated. However, when the love of God transforms the lives of people, it changes the heart, heals moral decay, provides strength to overcome temptation and gives the desire to reach out to people (friends, relatives’ neighbours, strangers and even enemies) in true love. The congregation’s main task with regard to moral regeneration is therefore to be clear about God’s mission, to discern what God is doing in the community and to serve his mission in practical ways.
Thesis (PhD)--University of Pretoria, 2013.
gm2014
Dogmatics and Christian Ethics
unrestricted

Any contractual operation has a risk, which can be assumed by one of the parties, as agreed. In this context, it is common for cases of delays due to concurrent causes imputable to both parties, which can generate a high difficulty when assigning the risk. In this article, the author explains, from a comparative perspective, the different possibilities of solution in front of cases related with the concurrent delay controversies. It analyzes the various doctrines developed both in the Civil Law tradition and in the Common Law.
Toda operación contractual conlleva un riesgo, el cual puede ser asumido por una de las partes según lo convenido. En ese contexto, es habitual que se presenten casos de demora (por causas concurrentes imputable a ambas partes, lo cual puede generar una gran dificultad al momento de asignar el riesgo. En el presente artículo, el autor explica, desde una perspectiva comparada, las diferentes posibilidades de solución frente a las controverisas relacionadas con la mora concurrente. Se analiza las diversas doctrinas desarrolladas tanto en la tradición del Civil Law como del Common Law.

The requirement for liquidated damages a convention, accessorial  to  the principal obligation, which guarantees the accomplishment of the first one. The penalty clause has received a different treatment in various legal systems; such are the French, Italian, German and Peruvian cases.In this article, the author explains the functions of the requirement for liquidated damages and its differences with similar figures. In addition he explains the relation between the requirement for liquidated damages and precontractual responsibility, as well as its role inthe scheme of contractual responsibility.
La cláusula penal es aquel negocio jurídico,accesorio a la obligación principal, por mediodel cual se garantiza el cumplimiento de dicha obligación. Este mecanismo de garantía delcumplimiento ha recibido un trato legislativodistinto en diversos ordenamientos, como elfrancés, italiano, alemán y peruano.En el presente artículo, el autor establece cuáles son las funciones de la cláusula penal y sus diferencias con figuras afines. Asimismo, explica la relación entre esta y la responsabilidad precontractual; así como su papel dentro del esquema de la responsabilidad contractual.

A presente dissertação de mestrado, apresentada como exigência parcial para obtenção do título de Mestre em Direito, na área de concentração do Direito do Estado, sob a orientação do Prof. Dr. José Levi Mello do Amaral Júnior, tem como tema análise do controle de constitucionalidade de omissões legislativas pelo Supremo Tribunal Federal na Constituição Federal de 1988. A delimitação da pesquisa empírica é referente aos julgados do Supremo Tribunal Federal, em sede de controle de constitucionalidade, abstrato ou concreto, de omissões legislativas, no período temporal de 05 de outubro de 1988 a 18 de dezembro de 2015. Com o levantamento dos dados chegou-se à divisão entre omissão legislativa total e omissão legislativa parcial. Com a análise dos julgados chegou-se à definição jurisprudencial de omissão legislativa, não sendo exatamente coincidente com a definição externada por parte da doutrina. Por fim, com o contexto de análise traçada, exarou-se conclusão crítica, definindo-se a necessidade de alteração legislativa para que as omissões decididas pelo Supremo Tribunal Federal, ao serem cientificadas ao Congresso Nacional, sejam realizadas com prazo para a colmatação da mora, sob pena de trancamento da pauta.
This dissertation is presented as partial requirement for obtaining the degree of Master in Law in concentration area of state law under the guidance of Prof. Dr. José Levi do Amaral Mello Júnior, has the theme analysis of judicial review of legislative omissions by the Supreme Court on Federal Constitution of 1988. The definition of the empirical research is related to the judgements of Supreme Court in judicial review, abstract or factual, of legislative omissions from 5 October 1988 to 18 December 2015. Hereupon, under this analysis obtained the jurisprudential definition of legislative omissions, which is not exactly coincident with the externalised definition by the doctrine. Ultimately, considering the method analysed, was consigned critical conclusion defining the need of legislative changing thus the omissions decided by the Supreme Court, aware the National Congress, are carried out with a deadline for warping under penalty of locking out the trial.

Gurtförderanlagen werden im Bergbau und anderen Industriezweigen zum Transport von Schüttgütern eingesetzt. Der Anlagenbetrieb ist mit Geräuschemissionen verbunden. Dies kann bei Kontrolle und Wartung eine erhöhte Lärmbelastung für betroffene Mitarbeiter hervorrufen. Im Umfeld von Wohnbebauungen oder schutzbedürftigen Objekten kann die Überschreitung von Immissionsrichtwerten zu einer zeitlichen Betriebseinschränkung der hocheffizienten Anlagen führen. Zur Lärmminderung an der Quelle oder deren Nähe erfordert dies technische Schallschutzmaßnahmen. Die Tragrollen im Obertrum der Gurtförderanlagen sind bei der akustischen Wirkung von entscheidender Bedeutung. Mit einem Prüfstand für Tragrollen ist deren Schallleistung bei unterschiedlichen Geschwindigkeiten bestimmbar. Die Ergebnisse lassen Rückschlüsse auf die mechanische Belastung und die Schallemission beim Betrieb in einer Förderanlage zu. Die Arbeit benennt die Ursachen der Geräuschemissionen beim Ablauf der Rollen und stellt diese in Verbindung mit den Eigenschaften der Oberfläche und der Außermittigkeit der Drehachse dar. Die Prüfung beider Parameter basiert auf einer Rundlaufmessung. Die gewonnenen winkelabhängigen Daten erlauben eine Berechnung der Exzentrizität der Drehachse und des Verlaufs der Kreisformabweichung auf dem Rollenmantel. Daraus abgeleitete Kennwerte dienen als Vorgaben zur Anpassung und Entwicklung von Herstellungsverfahren sowie zur gezielten Auswahl geräuscharmer Tragrollen für Gurtförderanlagen
Belt conveyor systems are used in mining operations and other industry sectors to transport bulk material. The plant operation is being linked to noise emissions. During inspections and maintenance this can cause an increased noise exposure for affected employees. In the environment of residential buildings or areas in need of protection the exceedance of immission guideline values can lead to a temporary operational limitation of these highly efficient plants. Noise abatement measures primarily at the source or in the vicinity are required to reduce noise immission. The idlers on the carrying belt side of the belt conveyor systems are of crucial importance to the acoustical properties. Their sound power level is determinable at different belt speeds with a test stand for idlers. The results allow conclusions about the mechanical stress and sound emissions during operation in a belt conveyor system. The thesis identifies the sources of noise during the roll process and places them in conjunction with the properties of the surface and the centre offset of the axis. The examination of these two parameters is based on a total indicator reading (TIR) measurement. The angle-dependent data obtained allow a calculation of the eccentricity of the axis and the curve of the circular deviation of the roller tubes. Therefrom derived characteristic values serve as specifications for the adaptation and development of manufacturing processes as well as for a careful selection of low noise idlers for belt conveyors

This Master of Fine Arts thesis is divided into four main sections:FAITH and DISBELIEF: In which I reckon with the implications of faith versus rationality as a secular nontheistic artist. IDEAS: The central locus of my work is a place of indeterminacy between what is known/familiar and what is just one step outside of that. This has nothing to do with mysticism, science fiction, or anything else unmoored from established fact. Section also touches on the particular vantage of a female artist with working class roots.THE WORK: Selection of work made during graduate school, and the the guiding thoughts behind each.EMPTINESS, STILLNESS, ABSENCE, GHOSTS, DOUBT: A discussion of influential artists and ideas.

Classically, wide-area synchronized power system monitoring has been an expensive task requiring significant investment in utility communications infrastructures for the service of relatively few costly sensors. The purpose of this research is to demonstrate the viability of power system monitoring from very low voltage levels (120 V). Challenging the accepted norms in power system monitoring, the document will present the use of inexpensive GPS time synchronized sensors in mass numbers at the distribution level. In the past, such low level monitoring has been overlooked due to a perceived imbalance between the required investment and the usefulness of the resulting deluge of information. However, distribution level monitoring offers several advantages over bulk transmission system monitoring. First, practically everyone with access to electricity also has a measurement port into the electric power system. Second, internet access and GPS availability have become pedestrian commodities providing a communications and synchronization infrastructure for the transmission of low-voltage measurements. Third, these ubiquitous measurement points exist in an interconnected fashion irrespective of utility boundaries. This work offers insight into which parameters are meaningful to monitor at the distribution level and provides applications that add unprecedented value to the data extracted from this level. System models comprising the entire Eastern Interconnection are exploited in conjunction with a bounty of distribution level measurement data for the development of wide-area disturbance detection, classification, analysis, and location routines. The main contributions of this work are fivefold: the introduction of a novel power system disturbance detection algorithm; the development of a power system oscillation damping analysis methodology; the development of several parametric and non-parametric power system disturbance location methods, new methods of power system phenomena visualization, and the proposal and mapping of an online power system event reporting scheme.
Ph. D.

This study examines the extent to which the teaching of Shona novels can be used to promote unhu (humanness) in Zimbabwean secondary schools where there has been a call for the teaching of cultural values. The school syllabi for Shona make this position abundantly clear. For that reason, anchoring the discussion on the role of literature in Africa as expounded by African scholars such as Ngugi wa Thiong’o (1981), p’Bitek (1986) and Achebe (1989) among others, the study observes that literature plays an important role in moulding character through advancing unhu. For instance, as Achebe (1989) argues that the novelist is a teacher, the study therefore locates literature as a life-affirming and life-extending affair. The discussion of the role of literature as a potential conduit for expressing unhu takes place within the theoretical confines of Afrocentricity, an African-centred theory that places the interests of Africa at the centre of any analysis involving African people. The selected novels namely Pfumo Reropa (1961), Kunyarara Hakusi Kutaura? (1983) and Ndafa Here? (2007) are therefore interrogated from an Afrocentric point of view. The three novels are representative of different historical epochs in Zimbabwe’s cultural trajectory. In addition, they have featured quite prominently on the school syllabi for Shona. Through a combination of interviews and critical analysis of the novels, the study crucially observes that the proper teaching of literature can effectively transform the thinking of learners thereby locating them in their own cultural platforms. However, for this to happen, teachers must be properly trained in order that they develop an appreciation of the value of literature in imparting unhu among learners. As a result, the study thus proposes sufficient conscientisation of teachers and learners on the concept and practice of unhu be systematically carried out. At the same, there is need for greater planning in constructing a more informing syllabus, as well as the deliberate inclusion of texts that canonise unhu.
African Languages
D. Litt. et Phil. (African Languages)

While moment matching can effectively reduce the dimension of a linear, time-invariant system, it can simultaneously fail to improve the stable time-step for the forward Euler scheme. In the context of a semi-discrete heat equation with spatially smooth forcing, the high frequency modes are virtually insignificant. Eliminating such modes dramatically improves the stable time-step without sacrificing output accuracy. This is accomplished by modal filtration, whose computational cost is relatively palatable when applied following an initial reduction stage by moment matching. A bound on the norm of the difference between the transfer functions of the moment-matched system and its modally-filtered counterpart yields an intelligent choice for the mode of truncation. The dual-stage algorithm disappoints in the context of highly nonnormal semi-discrete convection-diffusion equations. There, moment matching can be ineffective in dimension reduction, precluding a cost-effective modal filtering step.

Thèse en recherche-création.
Morel est un roman social qui raconte l’évolution de la ville de Montréal au cours du 20e siècle, en particulier des quartiers Centre-Sud et Hochelaga-Maisonneuve, à travers la vie familiale et professionnelle d’un personnage fictif, Jean-Claude Morel, de sa naissance durant la Grande crise jusqu’à l’année 2018. En tant qu’ouvrier travaillant aux grands projets d’ingénierie urbaine qui ont transformé Montréal (gratte-ciels, métro, autoroutes, échangeurs, tunnel Louis-Hippolyte- La Fontaine, stade olympique), Morel est une victime collatérale de la modernité à laquelle il contribue : la destruction du Faubourg à M’lasse, les expropriations en vue de la construction de l’autoroute Notre-Dame, la désindustrialisation et l’embourgeoisement ont pour effet de le repousser toujours plus loin vers l’est et de briser sa famille, alors que son métier exigeant et dangereux brise son propre corps. Morel remet en question la manière de raconter la vie d’un homme et de faire le récit d’une ville en faisant de la chronologie l’enjeu principal de sa forme, par un constant jeu d’analepses et par un télescopage temporel, la fin d’un chapitre se poursuivant au début du suivant, bien que l’action se déroule dans des lieux et un temps différents. Ainsi, ce roman est aussi une « fiction de l’histoire » en ce qu’il interroge les caractéristiques communes entre la fiction et la science de l’histoire : la narrativité, la focalisation, l’ancrage documentaire, et la chronologie au premier chef. /// Gilbert La Rocque, Montréal et la modernité pourrie est un essai littéraire dans lequel je m’investis comme écrivain pour faire dialoguer ma pratique d’écriture avec celle de l’écrivain montréalais Gilbert La Rocque (1943-1984). Auteur de six romans et d’un téléthéâtre entre 1970 et 1984, La Rocque, bien qu’il ait bénéficié de son vivant de la reconnaissance de ses pairs en tant que romancier et éditeur, demeure une figure négligée par les études littéraires québécoises. Cet essai a pour but de le recadrer dans l’écosystème littéraire de son époque en analysant comment sa représentation de Montréal est une manifestation du « catastrophisme [qui] se trouve au cœur même de la modernité québécoise » (Pierre Nepveu, L’écologie du réel), principalement à travers les figures de la ville en tant que « monstre-avaleur » et que nécropole dont les habitants sont des parasites, des insectes et des vermines. Le concept de modernité québécoise est interrogé dans une perspective historique, des représentations de Montréal au 19e siècle jusqu’à la Révolution tranquille où le Québec achève son « entrée dans la modernité » (Marcel Fournier). Les œuvres de La Rocque sont étudiées en fonction de diverses tendances qui animent la littérature québécoise durant la modernité propre à ses années de production : la littérature engagée ayant un « sujet- nation » comme protagoniste, les romans autoréférentiels de la modernité de l’écriture (Jean Fisette) et les romans de l’écrivain mettant en scène une institution littéraire professionnalisée, manifestations d’une « modernité avancée » spécifiquement québécoise qui, chez Gilbert La Rocque, étant donné l’omniprésence de la mort de la putréfaction dans son œuvre, est synonyme de modernité pourrie. Essai libre qui construit son propos dans la spéculation propre à la création littéraire universitaire (Jean-Simon DesRochers), Gilbert La Rocque, Montréal et la modernité pourrie peut être considéré comme un essai-découverte (Gérard Bessette) qui n’est pas sans rappeler les œuvres que consacre Victor-Lévy Beaulieu à ses influences.
Morel is a social novel that recalls the evolution of the city of Montréal throughout the twentieth century, in particular the working-class neighbourhoods of le Centre-Sud and Hochelaga- Maisonneuve, via the personal and professional life of Jean-Claude Morel, who was born during the Great Depression. The eponymous Morel, a construction worker, participates in major engineering works that change the face of Montréal (including sky-scrapers, the métro, highways, interchanges, the Louis-Hyppolite-La Fontaine tunnel, and the Olympic Stadium), and is also a collateral victim of the modernity he helps shape: the destruction of the Faubourg à M’lasse, the expropriations ahead of the construction of the Notre-Dame highway, the city’s deindustrialization and the gentrification push him further East and break up his family, while his dangerous and strenuous profession breaks his body. Morel questions the way we tell a character’s story and the history of a city by making chronology its key formal issue, through constant use of analepses and “temporal telescoping” between chapters, where the action at the end of a chapter is continued in the beginning of the next, even though the time and location of the action may differ. The novel is, therefore, a “fiction of history”: it questions those characteristics shared by fiction and by the discipline of history alike, such as narrativity, focalization, documentation reliability, and first and foremost chronology. /// Gilbert La Rocque, Montréal and the Rotten Modernity is a literary essay in which, as a fiction writer myself, I enter into dialogue with the work of Montréal writer Gilbert La Rocque (1943- 1984). Having published six novels and a television play published between 1970 and 1984, La Rocque gained recognition among his peers as a critical writer and editor, and yet he remains a marginal figure in Québec literary studies. This essay attempts to reframe him into his generation’s literary ecosystem by studying how his representation of Montréal is a manifestation of the “catastrophism at the heart of Québec’s modernity” (Pierre Nepveu, L’écologie du réel), mostly though the figures of the city as a “swallowing monster” and a necropolis inhabited by a population of parasites, insects, and vermin. The concept of Québec’s modernity is discussed within an historical perspective, from the representation of Montréal in nineteenth literature to the Quiet Revolution, when Québec finalizes its “entry in modernity” (Marcel Fournier). La Rocque’s novels are influenced by the various literary movements that evolved in Québec literature throughout the particular modernity of his fifteen years of production: militant literature with a “character-nation” as a protagonist, autoreferential novels characteristic of the writing modernity (Jean Fisette), and “writer novels” depicting the professionalization of Québec’s literary institution. All are manifestations of a specifically Québécois “advanced” or “late modernity”, which, considering the omnipresence of death and decay in La Rocque’s novels, is a modernity synonymous with putrefaction. This freely composed essay with the characteristic speculation of creative writing in University (Jean-Simon DesRochers) can be considered as an essay-discovery (Gérard Bessette) that resembles Victor-Lévy Beaulieu’s series dedicated to the authors that influenced him.

Classificação da Unidade Orgânica: A13;I39
Este trabalho baseia-se na análise dos vários processos de Microcrédito concedidos, nomeadamente em Portugal. A fundamentação teórica tem com principal objectivo expor as características do Microcrédito e respectiva adaptação ao caso Português. Determinou-se, desta forma, quais os motivos que podem atrasar, ou não, o pagamento das prestações do Microcrédito e explicou-se o incumprimento do mesmo. Os três exemplos práticos de concessão de microcrédito são casos de sucesso e estes enquadram-se na maioria dos negócios com estas características. A análise quantitativa teve como base uma entrevista na ANDC e estudo dos vários dados concedidos por esta entidade que reflecte o Microcrédito em todo o País, desde 1999. As conclusões a que chegámos foram que há factores que determinam o incumprimento do Microcrédito, e são eles: o número de prestações; o ano; o factor idade e o número dos postos de trabalho, que influenciam também a Mora do pagamento. Tendo em conta a análise efectuada, um dos aspectos menos positivos que deverá ser destacado é a dificuldade, que as pessoas tinham de ser informadas sobre a alternativa ao crédito tradicional, a acrescentar a dificuldade de acesso ao crédito, nomeadamente no que diz respeito à burocracia. Assim, este tipo de crédito é uma alternativa para quem não pode, ou lhe é limitado o acesso ao crédito tradicional. Foram efectuadas ainda algumas sugestões sobre melhorias a serem feitas, para uma maior taxa de cumprimento dos processos de Microcrédito. Esperamos que possamos ajudar a ANDC, e a sociedade, em especial, a que recorre ao Microcrédito.
This Project is based in analyse of Microcredits given, especially in Portugal. The theorical fundamentation has the main issue explain the characteristics of microcredit and the respective adaptation to Portuguese case. In this way, was determinated which are motivations that could to lead, or not, to the payment delay of microfinance and explain the not payment of it. We present three case studies, of microcredit and all of them are successfully, like almost microcredit. This quantitative analyse was based in an interview in ANDC and the statistic analysis and study of all information that was given by them, that reflect the microcredit in all country, since 1999. We concluded that there are some factors that influence the not payment of microcredit and the delay of payment, such as: age, year of microcredit; number of payments, number of labour posts. In account the analyse that has been done one of the less positive aspects is the difficulty that the people had of being informed on this alternative to the traditional credit, adding the difficulty of access to the credit, nominated in what it says respect to the bureaucracy. Thus, it is an alternative for who cannot, or the access to the traditional credit is limited it. There were made some suggestions about better aspects, that could be done, improvement the payment of microcredit. We hope that let us to help ANDC, and the society that it appeals to the microcredit in the generality.

Gurtförderanlagen werden im Bergbau und anderen Industriezweigen zum Transport von Schüttgütern eingesetzt. Der Anlagenbetrieb ist mit Geräuschemissionen verbunden. Dies kann bei Kontrolle und Wartung eine erhöhte Lärmbelastung für betroffene Mitarbeiter hervorrufen. Im Umfeld von Wohnbebauungen oder schutzbedürftigen Objekten kann die Überschreitung von Immissionsrichtwerten zu einer zeitlichen Betriebseinschränkung der hocheffizienten Anlagen führen. Zur Lärmminderung an der Quelle oder deren Nähe erfordert dies technische Schallschutzmaßnahmen. Die Tragrollen im Obertrum der Gurtförderanlagen sind bei der akustischen Wirkung von entscheidender Bedeutung. Mit einem Prüfstand für Tragrollen ist deren Schallleistung bei unterschiedlichen Geschwindigkeiten bestimmbar. Die Ergebnisse lassen Rückschlüsse auf die mechanische Belastung und die Schallemission beim Betrieb in einer Förderanlage zu. Die Arbeit benennt die Ursachen der Geräuschemissionen beim Ablauf der Rollen und stellt diese in Verbindung mit den Eigenschaften der Oberfläche und der Außermittigkeit der Drehachse dar. Die Prüfung beider Parameter basiert auf einer Rundlaufmessung. Die gewonnenen winkelabhängigen Daten erlauben eine Berechnung der Exzentrizität der Drehachse und des Verlaufs der Kreisformabweichung auf dem Rollenmantel. Daraus abgeleitete Kennwerte dienen als Vorgaben zur Anpassung und Entwicklung von Herstellungsverfahren sowie zur gezielten Auswahl geräuscharmer Tragrollen für Gurtförderanlagen.:1 Veranlassung und Bedeutung des Themas 2 Stand der Technik und des Wissens 3 Weiterentwicklung von Methoden zur Erfassung der Geräuschemission an Gurtförderanlagen 4 Entwicklung und Aufbau eines Prüfstandes zur Beschreibung der akustischen Eigenschaften von Tragrollen 5 Mathematische Modellierung zur Aufnahme geometrischer Rundlaufeigenschaften von Tragrollen 6 Technikums- und Feldversuche zur Validierung des mathematischen Modells und der akustischen Wirkung 7 Schlussfolgerungen zur Geräuschminderung an Förderanlagen
Belt conveyor systems are used in mining operations and other industry sectors to transport bulk material. The plant operation is being linked to noise emissions. During inspections and maintenance this can cause an increased noise exposure for affected employees. In the environment of residential buildings or areas in need of protection the exceedance of immission guideline values can lead to a temporary operational limitation of these highly efficient plants. Noise abatement measures primarily at the source or in the vicinity are required to reduce noise immission. The idlers on the carrying belt side of the belt conveyor systems are of crucial importance to the acoustical properties. Their sound power level is determinable at different belt speeds with a test stand for idlers. The results allow conclusions about the mechanical stress and sound emissions during operation in a belt conveyor system. The thesis identifies the sources of noise during the roll process and places them in conjunction with the properties of the surface and the centre offset of the axis. The examination of these two parameters is based on a total indicator reading (TIR) measurement. The angle-dependent data obtained allow a calculation of the eccentricity of the axis and the curve of the circular deviation of the roller tubes. Therefrom derived characteristic values serve as specifications for the adaptation and development of manufacturing processes as well as for a careful selection of low noise idlers for belt conveyors.:1 Veranlassung und Bedeutung des Themas 2 Stand der Technik und des Wissens 3 Weiterentwicklung von Methoden zur Erfassung der Geräuschemission an Gurtförderanlagen 4 Entwicklung und Aufbau eines Prüfstandes zur Beschreibung der akustischen Eigenschaften von Tragrollen 5 Mathematische Modellierung zur Aufnahme geometrischer Rundlaufeigenschaften von Tragrollen 6 Technikums- und Feldversuche zur Validierung des mathematischen Modells und der akustischen Wirkung 7 Schlussfolgerungen zur Geräuschminderung an Förderanlagen