O trabalho contextualiza historicamente, descreve e discute características de um possível perfil cognitivo dos engenheiros, atualizando-o em relação às necessidades da sociedade e da cultura contemporâneas, com base no paradigma multidisciplinar das Ciências Cognitivas, apresentado a partir da obra Como a mente funciona, de Steven Pinker, e em pesquisa bibliográfica sobre autores da área de Engenharia. Busca analisar criticamente as necessidades do ensino contemporâneo de Engenharia, identificando estratégia didáticopedagógica compatível com as características descritas no perfil. A elaboração didática de projetos foi a estratégia escolhida, por apresentar a mesma estrutura cognitiva (raciocínios, operações mentais, comportamentos, atitudes e posturas) da atividade profissional, bem como por caracterizar um contexto integrado de conceitos teóricos, atividades práticas, tomadas de decisão e vivências que deverão constituir um apoio à consolidação da memória de longa duração dos alunos, e, por conseguinte, de seu aprendizado, segundo conceitos apresentados por Roger Schank na obra Dynamic Memory Revisited. O trabalho se desenvolve com a escolha de um modelo de curso à distância estruturado a partir do mesmo paradigma, para aplicar a estratégia escolhida. Trata-se do modelo e-learning-by-doing, apresentado por Roger Schank na obra Designing world-class e-learning. São descritas atividades de planejamento, implantação e análise qualitativa de resultados de um curso-piloto à distância (com o referido modelo), de elaboração didática de um projeto de Engenharia Geotécnica, com alunos de mestrado do Pós-Graduação em Engenharia Civil, da Universidade Federal do Rio Grande do Sul, sob coordenação do prof. Fernando Schnaid. A experiência teve excelente receptividade e aproveitamento dos alunos. O framework teórico-conceitual multidisciplinar mostrou-se enriquecedor, apontando possibilidades de continuidade da pesquisa sobre ensino de Engenharia, relacionadas ao aprofundamento do perfil dos engenheiros, ao uso didáticopedagógico de projetos e ao modelo e-learning-by-doing, todos eles com aplicação na prática docente e na formação de professores. O trabalho constituiu pesquisa para obtenção do título de doutor, no Programa de Pós-Gradução em Informática na Educação (PPGIE) da Universidade Federal do Rio Grande do Sul (UFRGS), na linha de pesquisa Paradigmas para a Pesquisa sobre Ensino Científico e Tecnológico. / This work describes and discusses engineering profile from historical, cultural and cognitive perspectives, in an attempt to fit contemporary needs based on the multidisciplinary paradigm of Cognitive Sciences. Emphasis is given to Steven Pinker’s book How the mind works and other bibliographic research reported within the Engineering domain. Needs of contemporary Engineering education are analyzed, choosing a pedagogical strategy compatible with the described profile. Didactic project making was the chosen strategy - it comprises the same cognitive structure of the professional activity, including way of thinking, mental operations, behavior, attitude and states of mind. It can also be seen as a theoretical, practical, decision making and living context that supports long term memory consolidation and, as a consequence, supports the activity of learning, following ideas presented by Roger Schank’s book Dynamic Memory Revisited. The work follows a distance learning course based on the same cognitive paradigm chosen to represent the adopted model and strategy. The strategy is based on e-learning-by-doing model introduced by Roger Schank’s book Designing world-class e-learning, which is adopted to plan and to implement an experimental distance course for a project on Geotechnical Engineering, to masters students from the Civil Engineering Graduation Program at Federal University of Rio Grande do Sul, coordinated by professor Fernando Schnaid. The experience is reported and results are qualitatively analyzed with excellent responses from students in both participation and performance. Theoretical and conceptual multidisciplinary frameworks proved to be a reach framework to present and future research related to Engineering education, engineering profile, didactic use of projects adopting the e-learning-by-doing model. This concept can be applied to graduate and undergraduate courses and to teachers´ continuous education. The work is part of the requirements designed to obtain a PhD degree at the Informatics applied to Education Graduation Program (PPGIE), from Federal University of Rio Grande do Sul (UFRGS), Brazil, in the research line of “Paradigms for the Research on Scientific and Technological Education”.

Submitted by (edna.saturno@ufrpe.br) on 2017-04-27T13:33:13Z No. of bitstreams: 1 Janio Benevides de Melo.pdf: 845976 bytes, checksum: 55b3b13a3bb41e12d05e1264797fff7c (MD5) / Made available in DSpace on 2017-04-27T13:33:13Z (GMT). No. of bitstreams: 1 Janio Benevides de Melo.pdf: 845976 bytes, checksum: 55b3b13a3bb41e12d05e1264797fff7c (MD5) Previous issue date: 2011-02-28 / The zoometric measures of the adult Nordestina horse breed from Pernambuco and Piauí states were the objective of this study. The same measurer have taken 48 body measures, which resulted in 9 zoometric indices (in a total of 57 quantitative traits) on 238 animals, among males, females and geldings. The qualitative traits were evaluated according to coat color, bridge of nose profile, position of lips, neck shape, slope of croup, hooves color and size. The quantitative traits were evaluated by analysis of variance, descriptive statistics and principal components analysis, whereas the qualitative traits by frequency distribution. The principal components analysis reduced 50 body measures to 9 components for males and females and 7 components for geldings. The number of variables for males, females and geldings was shortened to 21, 20 and 18, respectively, using the principal component analysis, in which 15 measures were in common for males, females and geldings (withers height, back height, height from sternum to ground, croup height, forelimb height, hind-limb height, insertion of tail height, fore-pastern length, back-loin length 1, hind-pastern length, fore-cannon perimeter, fore-fetlock perimeter, fore-pastern perimeter, fore-fetlock perimeter and hind-pastern perimeter). These measures can be used for further studies, regardless of animal sex. The withers height had strong correlation with the other heights and the perimeters were strongly correlated among them according to the anatomical region of the members. In general, all animals from Pernambuco and Piauí states were small-sized and classified as hypometric due to the weights (estimated weight and body weight) and as mediolineous (balance body) by body index, within a range between strength and speed (saddle and light traction).Conformation and compactness indices had classified them as more able to saddle than draft. The dactyl-thoracic index classified the animals as heavy draft horses, except for females from Pernambuco state (intermediate ability). The wok indices 1 and 2 shows that animals from Pernambuco can support greater weight at a trot or gallop. The ethnological profile study detected a prevalence of gray coat color, black and small hooves, subconvex bridge of nose, pyramidal neck, firm and juxtaposed lips. Just the male animals from Pernambuco had a croup classified as lightly inclined. Sexual dimorphism and origin effect on most measures and indices were detected, indicating the existence of two ecotypes. / Objetivou-se com este estudo a caracterização zoométrica do remanescente do cavalo Nordestino nos estados de Pernambuco e Piauí. Foram tomadas 48 medidas zoométricas, por um único mensurador, e obtidos 9 índices zoométricos, totalizando 57 variáveis quantitativas em 238 animais machos, fêmeas e machos castrados. Foram avaliadas também características qualitativas: coloração da pelagem, perfil de chanfro, justaposição dos lábios, forma do pescoço, inclinação de garupa, coloração e tamanho dos cascos. Para as variáveis quantitativas foi realizada análise de variância, estatística descritiva e análise de componentes principais e, para as variáveis qualitativas foi feito distribuição de frequência. Com auxílio da técnica de componentes principais foi possível reduzir as 50 variáveis estudadas em 9 componentes para os machos e fêmeas e 7 componentes para os machos castrados. Foi possível ainda selecionar dentro das componentes as variáveis de maior peso, reduzindo o número de variáveis para 21, 20 e 18, respectivamente, para machos, fêmeas e machos castrados. Desse total, 15 medidas foram igualmente importantes nos 3 grupos estudados (altura na cernelha, altura no dorso, altura do vazio subesternal, altura na garupa, altura do membro anterior, altura do membro posterior, altura na inserção de cauda, comprimento da quartela anterior, comprimento de dorso-lombo 1, comprimento de quartela posterior, perímetro de canela anterior, perímetro de boleto anterior, perímetro de quartela posterior, perímetro de boleto posterior e perímetro de quartela posterior), que poderão ser usadas em estudos futuros, independentemente do sexo do animal. De maneira geral, para todas as classes estudadas, a altura na cernelha demonstrou forte correlação com as demais alturas; os perímetros referentes a região anatômica dos membros também foram fortemente correlacionados entre si. O estudo permitiu classificar os animais como de porte pequeno e de boa proporção entre a altura na cernelha, na garupa e no comprimento do corpo, com exceção das fêmeas do estado de Pernambuco, e como hipométricos quanto aos pesos e ao índice corporal como mediolíneos, com aptidão intermediária para velocidade e força, ou seja, sela e tração ligeira. Os índices de compacidade e conformação indicam que são animais com aptidão mais para sela que tração. O índice dáctilo-torácico indica que são animais com aptidão para tração pesada com exceção das fêmeas do estado de Pernambuco com aptidão intermediária. Os índices de carga 1 e 2 indicaram maior capacidade de suporte de peso sobre o dorso a trote ou a galope e a passo, aos animais do estado de Pernambuco. Em relação ao perfil morfológico e faneróptico, verificou-se predominância de pelagem tordilha, cascos escuros ou pretos e pequenos, perfil de chanfro subconvexo e pescoço com forma piramidal, lábios firmes e justapostos e garupa ligeiramente inclinada. Ocorreu dimorfismo sexual e efeito de local sobre a maioria das medidas e dos índices avaliados, indicando a existência de dois ecótipos.

Made available in DSpace on 2016-03-15T19:40:29Z (GMT). No. of bitstreams: 1 Maria Luiza Mesquita.pdf: 1339144 bytes, checksum: 96e23145c62c671a2f420c67daa9ed7f (MD5) Previous issue date: 2008-02-13 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Prader Willi syndrome is a genetic disorder caused by the absence of the paternally derived PWS region of chromosome 15. Some patognomonics symptoms of this disorder are hyperphagia and obesity, which in most cases happens before the age of six and they severely harm the quality of life of such patients. The present study has focused on the behavioral area and aimed at identifying the daily frequency of eating habits and the caloric intake of children with PWS; identifying the variables of family interaction which control the eating behavior and tracing a cognitive and behavioral profile of the PWS patients. The sample was made by eleven children with a PWS genetic diagnosis, between the ages of 7 and 16 and their parents. The data collecting instruments were: a questionnaire for the eating habits record of the children, an interview to identify controlled environment variances of the eating behavior and the Brazilian version of the Child Behavior Checklist for ages 6-18 (CBCL/6-18) by Achenbach and the WISC-III test (Wechsler Intelligence Scale for Children- 3 rd edition). The data went through an evaluation which included topographic record and functional analysis of eating behavior and others types of children´s non- adaptive behaviors and analyses and comparison of frequency distribution of these behaviors in relation to cognitive and behavioral profiles of the patients. The group was characterized as obese according to the BMI calculation. The main results showed that 82% from the total classified in the WISC-III test as mentally retarded, 100% of the sample was at clinic level and in at lest one of the syndrome scales, competences or problems of the instrument CBCL/6-18. One of the high frequency behavioral classes was the negotiations to obtain food from their parents. There is a behavioral chart configured as pathological in terms of response for tantrums, manipulation, aggressiveness, breaking of rules and oppositionist behavior. Psychiatric comorbidity has also been identified, associated to high consumption of psychotropic drugs. / A Síndrome de Prader Willi (SPW) é uma doença genética de origem paterna causada pela perda de expressão de genes no cromossomo 15. Alguns sintomas patognomônicos da doença são a hiperfagia e a obesidade que, na maioria dos casos, ocorre antes dos seis anos e compromete severamente a qualidade vida desses pacientes. O presente estudo se concentrou na área comportamental e teve como objetivos: - identificar a freqüência diária de comportamentos alimentares e ingestão calórica de crianças com SPW; - identificar as variáveis de interação familiar que controlam os comportamentos alimentares e; - traçar um perfil comportamental e cognitivo dos sujeitos com SPW. A amostra foi composta por onze crianças com diagnóstico genético de SPW, na faixa etária de 7 a 16 anos e seus pais. Os instrumentos de coleta de dados foram: um questionário para o registro de hábitos alimentares da criança, uma entrevista para identificar variáveis ambientais controladoras dos comportamentos alimentares, a versão brasileira do Child Behavior Checklist for ages 6-18 (CBCL/6-18) de Achenbach e o Teste WISC-III (Escala de Inteligência Wechsler para crianças 3ª edição). Os dados passaram por uma avaliação que incluiu um registro topográfico e análise funcional de comportamentos alimentares e de outros tipos de comportamentos desadaptativos das crianças e análise e comparação das distribuições de freqüências desses comportamentos em relação aos perfis cognitivo e comportamental dos sujeitos. O grupo foi caracterizado como obeso de acordo com o cálculo do IMC. Os principais resultados apontaram que 82% do total classificaram-se no teste WISC-III como débil mental, 100% da amostra pontuaram na faixa clínica em, pelo menos uma das escalas das síndromes, competências ou problemas do instrumento CBCL/6-18. Uma das classes comportamentais de alta freqüência foram as negociações para obter alimentos dos pais. Há um quadro comportamental configurado como patológico em termos de respostas de birra, manipulação, agressividade, quebrar regras e oposicionismo. A comorbidade psiquiátrica também foi identificada, inclusive associada a um consumo elevado de psicotrópicos.

Submitted in fulfillment of the requirements for Master’s Degree in Technology: Chiropractic, Durban University of Technology, Durban, 2017. / Background: Ice hockey is a fast paced team sport, played on an ice surface in an enclosed arena. As a result of the high contact, aggressive nature of the sport, players are susceptible to injury. Ice hockey is not a popular sport in South Africa and the environment is unique in comparison to international ice hockey countries. The playing surfaces and ice rink arenas differ across South Africa, which may affect the risk of injury in this population. Protective equipment is not easily accessible to ice hockey players in South Africa and therefore they may be at a higher risk of injury. Participation in ice hockey is developing in South Africa; however there is a paucity in the literature relating to injuries in the South African context. This study aimed to determine a profile of ice hockey injuries in South African players. Methodology: This study was a quantitative, descriptive study that used a self-administered questionnaire. The questionnaire was administered to 187 ice hockey players (141 male and 46 female) who were registered with the South African Ice Hockey Association. Players were required to sign the letter of information and informed consent form, following which, questionnaires were distributed to the participants who met the study criteria. The researcher was present to supervise and collect all forms and completed questionnaires directly after completion. The questionnaire contained sections on demographics, injuries sustained over the previous season as well as the use of protective equipment. The results were analysed using SPSS version 24 and a p value of < 0.05 was considered statistically significant. Results: The response rate met the minimum requirement of 138 males and 45 females. Of the 187 participants, 110 (58.8%) of the participants sustained at least one injury due to ice hockey. Age was considered to be a risk factor in this study as those participants in the youngest age group of 18-27 were at a higher risk of all injuries (χ2 p-value < 0.0001). Although gender was not a risk factor for the total number of injuries, female players in this study were at a greater risk of head and knee injuries (χ2 p-value = 0.0196 and χ2 p-value = 0.0046 respectively). The most severe injury affected the head (10.2%, n = 19) and overall the knee was the most commonly affected area of injury (n = 30). The majority of the injuries were sustained during a game and resulted from contact with another player. The results of this study showed that the use of protective equipment does not prevent all injuries in ice hockey. The type of facial protection worn was a risk factor for facial injuries and the lack of a mouthguard was a risk factor for head injuries. Conclusion: The aim of this study was to determine a profile of ice hockey injuries in South African players. The South African demographic profile of ice hockey players showed similarities to international profiles with respect to age, gender, BMI and player position. The profile of injuries in this study was similar to international injury profiles in terms of site, type, severity, onset and mechanism of injury and regarding the majority of injuries being sustained during a game. Ice hockey players in the younger age groups were at a higher risk of injury both in South Africa and internationally. Females were at a higher risk of head injuries in comparison to males which is congruent with international literature. In South Africa, and internationally, the use of full facial protection and a mouthguard was shown to decrease the risk of facial and head injuries respectively. The South African demographic profile differed from international findings in terms of experience level, total hours of training per week and number of games played in a season. The injury profile of South African ice hockey players showed that this population is at a higher risk of muscular injuries than international players. Larger ice surfaces and flexible boards and glass did not reduce the risk of injury in South African ice hockey players in the same way as it has internationally. / M

Magister Scientiae (Occupational Therapy) - MSc(OT) / Children with autism typically present with sensory processing difficulties that affect their ability to relate to people. This qualitative study focused on exploring the sensory processing of children with autism and their mothers, using a frame of reference of sensory integration theory. The purpose of the study was to help mothers gain knowledge and understanding into their own sensory processing so that they could develop a better understanding of their child's sensory processing in order to facilitate better mother-child relationships. An evaluation tool, the Sensory Profiles by Dunn (1999) and the Adolescent/Adult Sensory Profile by Brown & Dunn (2002) was used as the instrument for gathering information on sensory processing. The population consisted of ten sets of mothers and their children with autism who attend Vera School for Learners with Autism. The Sensory Profiles was completed to investigate the phenomenological issues regarding the sensory modulation aspects of the parent-child relationship. Each mother received individual feedback on their own and their child's sensory processing. Two focus groups were then conducted with the mothers to determine the value of the information gained from the profiles. Data consisted of two audio taped feedback from the focus group. Data was analysed for emerging themes. The three major themes that emerged were, (a) You realize how similar you are to your child, (b) I also have needs (c) They walk away and leave you with this wreck of a child. The findings of the study suggest that an understanding of sensory processing can influence the mother-child relationship positively. / South Africa

For gas turbines, the demand for high-performance, more efficient and longer-life turbine blades is increasing. This is especially so, now that there is a need for high-power and low-weight aircraft gas turbines. Thus, the search for improved design methodologies for the optimisation of combustor exit temperature profiles enjoys high priority. Traditional experimental methods are found to be too time-consuming and costly, and they do not always achieve near-optimal designs. In addition to the above deficiencies, methods based on semi-empirical correlations are found to be lacking in performing three-dimensional analyses and these methods cannot be used for parametric design optimisation. Computational fluid dynamics has established itself as a viable alternative to reduce the amount of experimentation needed, resulting in a reduction in the time scales and costs of the design process. Furthermore, computational fluid dynamics provides more insight into the flow process, which is not available through experimentation only. However, the fact remains that, because of the trial-and-error nature of adjusting the parameters of the traditional optimisation techniques used in this field, the designs reached cannot be called “optimum”. The trial-and-error process depends a great deal on the skill and experience of the designer. Also, the above technologies inhibit the improvement of the gas turbine power output by limiting the highest exit temperature possible, putting more pressure on turbine blade cooling technologies. This limitation to technology can be overcome by implementing a search algorithm capable of finding optimal design parameters. Such an algorithm will perform an optimum search prior to computational fluid dynamics analysis and rig testing. In this thesis, an efficient methodology is proposed for the design optimisation of a gas turbine combustor exit temperature profile. The methodology involves the combination of computational fluid dynamics with a gradient-based mathematical optimiser, using successive objective and constraint function approximations (Dynamic-Q) to obtain the optimum design. The methodology is tested on three cases, namely: (a) The first case involves the optimisation of the combustor exit temperature profile with two design variables related to the dilution holes, which is a common procedure. The combustor exit temperature profile was optimised, and the pattern factor improved, but pressure drop was very high. (b) The second case involves the optimisation of the combustor exit temperature profile with four design variables, one equality constraint and one inequality constraint based on pressure loss. The combustor exit temperature profile was also optimised within the constraints of pressure. Both the combustor exit temperature profile and pattern factor were improved. (c) The third case involves the optimisation of the combustor exit temperature profile with five design variables. The swirler angle and primary hole parameters were included in order to allow for the effect of the central toroidal recirculation zone on the combustor exit temperature profile. Pressure loss was also constrained to a certain maximum. The three cases show that a relatively recent mathematical optimiser (Dynamic-Q), combined with computational fluid dynamics, can be considered a strong alternative to the design optimisation of a gas turbine combustor exit temperature profile. This is due to the fact that the proposed methodology provides designs that can be called near-optimal, when compared with that yielded by traditional methods and computational fluid dynamics alone. / Thesis (PhD)--University of Pretoria, 2009. / Mechanical and Aeronautical Engineering / unrestricted

Developmental Dyspraxia and Sensory Modulation Dysfunction are Sensory Integration Disorders that are widely known to occupational therapists practicing in the paediatric occupational therapy field. These disorders have been the subject of numerous research studies that have managed to clarify and explain relations of these disorders with sensory processing as well as their prevalence in different diagnostic groups. Such a clarified relationship is between Developmental Dyspraxia and Sensory Discrimination, while Sensory Modulation Dysfunction is reported to occur in various diagnostic groups. Developments over the past decade in the field of Sensory Integration proposed that Developmental Dyspraxia and Sensory Modulation Dysfunction be regarded as two patterns of a Sensory Processing Disorder and suggested that these two disorder patterns occurred concomitantly. Clinical experience, however, resulted in the researcher questioning the above proposed concomitant relationship and hypothesised that there was a specific relation between Developmental Dyspraxia and Sensory Responsivity (Sensory Modulation Dysfunction). This study was directed at investigating the relationship between Developmental Dyspraxia and Sensory Responsivity. A review of the literature that described these two disorder patterns yielded reference to theories that underpin Developmental Dyspraxia and Sensory Responsivity. From these theories it was possible to identify some common ground between Developmental dyspraxia and Sensory Responsivity that could potentially support a relation. The Sensory Profile, Sensory Profile School Companion and the Sensory Integration and Praxis Tests were used to assess and identify Developmental Dyspraxia and Sensory Responsivity. Obtained data were statistically analysed and compared and did not produce a statistically significant positive relation between Developmental Dyspraxia and Sensory Responsivity, but yielded some weak correlations in supplementary analysis. These weak correlations have value in terms of sensory responsiveness tendencies in the presence of types of dyspraxia. Clinical analyses of the data set were performed to examine the incidence of types of dyspraxia in the sample with sensory over- or under responsiveness. These analyses demonstrated a greater presence of Developmental Dyspraxia in the population with Sensory Under-responsivity. The clinical analyses provided the researcher with additional information that was taken into account when conclusions were made. It also contributed to the recommendations that were made at the end of Chapter 5. Discussion of results was directed at explaining correlations and interpreting the implications of those correlations. A discussion of possible problems included considering possible flaws in the method and procedure that could have contributed to the research outcome. Recommendations were directed at proposals for future research and recommendations for clinical practice. Copyright / Dissertation (MOccTher)--University of Pretoria, 2010. / Occupational Therapy / unrestricted

No description available.

Subject of diploma thesis is bending on technology production profile inflexion used for bearing construction industrial lifts, in work should be designed processing profile inclusive proposal tools and pressing machinery.

Numerical procedures for reliable wheel and rail wearprediction are rare. Recent development of simulationtechniques and computer power together with tribologicalknowledge do however suggest computer aided wear prediction.The objective of the related research field at the RoyalInstitute of Technology (KTH) is to arrive at a numericalprocedure able to simulate profile evolution due to uniformwear to a degree of accuracy sufficient for application tovehicle dynamics simulation. Such a tool would be useful formaintenance planning as well as optimisation of the transportsystem and its components. The research contribution accounted for in this thesisincludes, in addition to a literature review, refinement ofmethods applied to uniform wheel wear simulation by inclusionof braking and improvement of the contact model. Further atentative application to uniform rail wheel simulation has beenproposed and tested. The first part addresses issues related to braking andwheel-rail contact conditions in the context of wheel wearsimulation. The KTH approach includes Archard’s wear modelwith associated wear maps, vehicle dynamics simulation andrailway network definition. In previous work at KTH certainvariations in operating conditions have been accounted forthrough empirically estimated average scaling factors. Theobjective of the current research is to be able to include suchvariations in the set of simulations. In particular theinfluence of disc braking and varying friction and lubricationconditions are investigated. Both environmental factors likemoist and contamination and deliberate lubrication need to beconsidered. As part of the associated contact analysis theinfluence of tangential elastic deformation of the contactingsurfaces on the sliding velocity has been separatelyinvestigated and found to be essential in case of partial slipcontact conditions. In the second part validation of the improvements related towheel wear simulation is addressed. Disc braking has beenincluded in the simulation set and a wear map for moist contactconditions based on recent tribometer tests has been draftedand tested. It has been shown that the previously used brakingfactor accounts for the combination of the contributions fromsurface elasticity and braking. Good agreement withmeasurements from the Stockholm commuter service is achieved.It is concluded that the model improvements accounted for aresufficient for adequate simulation of tread wear but thatfurther development of the flange / gauge corner contactmodelling may be needed. In the final part a procedure for simulation of rail wearand corresponding profile evolution has been formulated. Asimulation set is selected defining the vehicles running on thetrack to be investigated, their operating conditions, andcontact parameters. Several variations of input data may beincluded together with the corresponding occurrenceprobability. Trial calculations of four non-lubricated curveswith radii from 303 m to 802 m show qualitatively reasonableresults in terms of profile shape development and difference inwear mechanisms between gauge corner and rail head. The wearrates related to traffic tonnage are however overestimated. Itis believed that model refinements in terms of environmentalinfluence and contact stress calculation are useful to improvethe quantitative results. / QC 20100531