This study examined the effects of a learning environment (embodying many of De Corte et al.’s, (2004) CLIA-model components) on secondary students’ mathematical beliefs. Such mathematical beliefs have been of interest to the research community due to their expected impact on students’ willingness to engage in mathematical problem-solving. This research adopted an action research methodology using a quasi-experimental sequential explanatory mixed methods design. Data was collected using the Mathematics Related Beliefs Questionnaire (MRBQ) and a number of focus groups and individual interviews were undertaken. The sample selected (age 13-14) was from a population of convenience. There was one treatment class (N=22) and three control classes (N=45). The classroom intervention was of six months duration and was carried out by the researcher teacher in a secondary community school. Findings revealed no significant positive effects on students’ beliefs from the new learning environment about the teacher’s role in the classroom, their personal competence and the relevance to their lives and mathematics as an inaccessible subject. A more negative outcome for the fourth factor of the MRBQ scale, ‘mathematics as an inaccessible subject’, resulted for all participants (experimental and control combined) with a moderate effect of eta2=0.09. Findings from the qualitative data indicated the experimental participants found mathematics to be a difficult but useful subject. Findings, overall, revealed no significant differences between the experimental and control classes, indicating the new learning environment had not had a positive impact on the beliefs examined. Possible factors identified were the length of the intervention, the ages of participants and the socio-economic status of the majority taking part in this study. Qualitative data also indicated participants in the treatment class had found some of the activities used in the intervention to be interesting and enjoyable. Responses to the use of group work indicated participants were both willing and able to enter into communities of learners. Other results showed that participants with the highest achievement scores appeared to be the most confident learners of mathematics. Participants appeared to accept the need to have patience and perseverance when solving difficult problems but this was not translated into action in the classroom. The importance of understanding mathematics appeared to be accepted by participants. Implications for methodology, research and practice are discussed in light of these findings.

Thesis (MMed (Surgical Sciences. Plastic and Reconstructive Surgery))--University of Stellenbosch, 2010. / The repair of full-thickness defects of the lower eyelids poses a challenge because a graft in combination with a flap is typically used to replace either the posterior or anterior lamella. This often results in aesthetically and functional unsatisfactory outcomes. A rotation-advancement tarso-conjunctival cheek flap, which reconstructs both posterior and anterior lamella with vascularized tissue similar to the native eyelid, is described. Nine patients underwent reconstruction with a rotation-advancement tarso-conjunctival cheek flap. The indications, complications and outcomes were evaluated. The follow-up time ranged from 6 to 60 months with an average of twenty three months. The main indication for use of this flap is full-thickness defects of the lower eyelid between 25 – 75 %, typically after tumour ablation. All the patients had a functional and aesthetically satisfactory outcome. One patient underwent a revision canthoplasty. The rotation-advancement tarso-conjunctival cheek flap adheres to basic plastic surgery principles resulting in a satisfactory outcome; (a) Vascularized tissue is used to reconstruct the defect. (b)The flap composition is similar to the native eyelid i.e. replace like with like. (c) The flap makes use of tissue that is excess and therefore limits donor morbidity.

Thesis (MScMedSc)--Stellenbosch University, 2012. / ENGLISH ABSTRACT: Lower limb amputations cause multiple physical, psychological, environmental and socioeconomic barriers. Individuals who have suffered a lower limb amputation require comprehensive rehabilitation to ensure social integration and economic self-sufficiency. In addition, constant monitoring and evaluation is an essential part of human service delivery programmes. However, the amputation rehabilitation programme offered at Elangeni an outpatient rehabilitation centre for clients with physical disabilities in Paarl, Western Cape, South Africa is not monitored, and has not been evaluated since its inception in 2000. Thus, the current study evolved to describe and evaluate the rehabilitation programme for persons with lower limb amputations at Elangeni. A mixed method descriptive design was implemented. All persons who received rehabilitation, after a major lower limb amputation at Elangeni, between 2000 to 2011, were included in the study population. In addition, the physiotherapist and occupational therapist that provided amputation rehabilitation at Elangeni, at the time of the study, were interviewed. Thirty participants who met the study inclusion criteria were identified. Quantitative data was collected using a researcher designed, structured demographic questionnaire, an International Classification of Function checklist based questionnaire and a participant rehabilitation folder audit form. Two interview schedules one for clients and one for therapists were used for guidance during semi structured interviews. Quantitative data was entered onto a spread sheet and analysed by a statistician using Statistica, version 8. Qualitative data was thematically analysed according to predetermined themes. No programme vision, mission or objectives could be identified for the amputation rehabilitation programme. Poor record keeping practices and a lack of statistics were found. Rehabilitation was impairment focused with no attention given to social integration. Clients who received prosthetic rehabilitation showed improved functional ability with regard to picking up objects from the floor (p = 0.031) getting up from the floor (p = 0.00069), getting out of the house (p = 0.023), going up and down stairs with a handrail (p = 0.037) and moving around in the yard (p = 0.0069), climbing stairs without a handrail (p = 0.037), going up and down a kerb (p = 0.0082) walking or propelling a wheelchair more than 1km (0.0089) and walking in inclement weather (0.017). A lack of indoor mobility training had a statistically significant negative impact on the participants’ ability to lift and carry objects (p 0.011), standing up from sitting (p = 0.042), getting around inside the house (p = 0.00023), picking up objects from the floor (p = 0.00068), getting up from the floor (p = 0.0072), getting out of the house (p = 0.0016), going up and down stairs with a handrail (p = 0.019), moving around in the yard (0.0013), going up and down stairs with-out a hand-rail (p = 0.019), getting up and down a kerb (p = 0.0022), walking or wheeling 1km or more (p = 0.0032) and using transport (p = 0.0034). Failure to address community mobility during rehabilitation had a statistically significant negative impact on all aspects of community mobility scores except doing transfers and driving. In conclusion, for the study participants, Elangeni failed to provide rehabilitation according to the social model of disability and Community Based Rehabilitation principles. It is recommended that managers, service providers, and clients re-consider the purpose of Elangeni and develop a vision and objectives for that service. In addition, management should take an active role in service monitoring and evaluation and provide guidance and mentorship to therapists. / AFRIKAANSE OPSOMMING: Onderste ledemate amputasies impak negatief op `n persoon se fisiese, sielkundige en sosiale funksionering. Individue wat ’n amputasie ondergaan het benodig omvattende rehabilitasie om sosiale integrasie en ekonomiese onafhanklikheid te verseker. Konstante monitering en evaluasie is ’n essensiële deel van rehabilitasie programme. Nietemin die amputasie rehabilitasie program wat by Elangeni aangebied word, word nie gemoniteer nie en was nog nooit geëvalueer nie. Dus het hierdie studie dit ten doel om die rehabilitasie programme vir persone met onderste ledemate amputasies by Elangeni te beskryf en te evalueer. Kwantitatiewe en kwalitatiewe navorsingsmetodes is in kombinasie gebruik in die studie. Alle persone wat rehabilitasie by Elangeni ontvang het na ’n onderste ledemaat amputasie, sowel as die terapeute wat by Elangeni werk, het die studie populasie gevorm. In totaal het 32 persone aan die studie deelgeneem. Kwantitatiewe data is met behulp van `ʼn demografiese vraelys, `ʼn ICF gebaseerde vraelys, en `ʼn leer oudit vorm ingesamel. Twee onderhoud skedules, een vir die kliënte en een vir die terapeute, is gebruik as riglyn tydens insameling van kwalitatiewe data. Kwantitatiewe data is statisties ontleed deur ʼn statistikus wat gebruik gemaak het van Statistica 8. Voorafbepaalde temas is gebruik tydens tematies ontleding van kwalitatiewe data. Geen program visie, missie of doelwitte kon geïdentifiseer word nie. Swak rekord houdings praktyke was gevind. Rehabilitasie het gefokus op die fisiese en nie op sosiale integrasie nie. Die kliënte wat prostetiese rehabilitasie ontvang het, het statisties beduidend beter gevaar ten opsigte van optel van voorwerpe van die vloer af (p = 0.031), om van die vloer af op te staan (p = 0.00069), om uit die huis uit te kom (p = 0.023), om trappe met `ʼn handreling te klim (p = 0.037), om op die erf rond te beweeg (p = 0.0069), om trappe sonder `ʼn reling te klim (p = 0.037), om by sypaadjies op en af te gaan (p = 0.0082), om meer as `ʼn kilometer te loop of met die rolstoele te ry (0.0089) en om in ongure weer te loop (0.017). `ʼn Tekort aan heropleiding van mobiliteit binne die huis het `ʼn statisties beduidende impak gehad op die vermoë om goed te dra (p 0.011), op te staan van sit af (p = 0.042), in die huis rond te beweeg (p = 0.00023), voorwerpe van die vloer af op te tel (p = 0.00068), van die vloer af op te staan (p = 0.0072), uit die huis uit te kom (p = 0.0016), trappe met `ʼn handreling te klim (p = 0.019), in die erf rond te beweeg (0.0013), trappe sonder `ʼn handreling te klim (p = 0.019), by `n sypaadjie op en af te gaan (p = 0.0022), meer as 1km te loop of met die rystoel te ry (p = 0.0032) en om vervoer te gebruik (p = 0.0034). `ʼn Gebrek aan heropleiding van gemeenskapsmobiliteit het `ʼn statisties negatiewe impak gehad op alle aspekte van gemeenskapsintegrasie behalwe die doen van oorplasings en bestuur. Rehabilitasie praktyke was nie gebaseer op die sosiale model van gestremdheid en Gemeenskap Gebaseerde Rehabilitasie beginsels nie. Dit word aanbeveel dat diens verskaffers, kliënte en bestuurders oor die fokus van rehabilitasie by Elangeni moet besin. Daar moet ʼn visie en doelwitte vir die diens ontwikkel word. Voorts moet bestuurders van distrik vlak ʼn aktiewe rol speel in die monitering en evaluasie van dienste en mentorskap aan terapeute verseker.

Lower extremity injuries are the most common sports related injury. Many steps have been taken to attempt to identify individuals who might be at a higher risk for sustaining a lower extremity injury. Resource and time intensive screening techniques have been used previously to attempt to identify such individuals. However these techniques have focused heavily on postural control and landing mechanics in athletes, no psychological measure has been used to identify individuals who might be at a higher risk of lower extremity injury. Self-efficacy of balance can be defined as how capable an individual feels he or she can balance in different scenarios. Research in the balance deficient population (elderly, post-stroke, knee osteoarthritis) has revealed that selfefficacy of balance is a quantifiable psychological component of balance related behavior. As previously stated, current screening techniques for lower extremity injuries do not incorporate psychological measures. Research suggests that psychological indicators of balance confidence are important to measure in conjunction with balance test performance to establish the relationship between the two constructs. Assessment of these factors is necessary to examine how psychological measures affect performance on tests used in clinical balance assessments. The objective of this dissertation was to develop the Self-Efficacy of Balance Scale (SEBS), a psychometrically sound self-efficacy of balance instrument for use in the young, active population. The relationship between selfefficacy of balance and self-reported measures of lower extremity function, and clinical and laboratory measures of balance were also examined in the young, active population. It was hypothesized that a valid, reliable, responsive tool could be created to accurately and precisely measure self-efficacy of balance in a young, active population. It addition, it was hypothesized that high levels of selfefficacy of balance would have a significant, positive relationship with selfreported measure of lower extremity function, and clinical and laboratory measure of balance. Results from the three studies brought about several interesting observations. Studies one, two, and three demonstrated evidence of a psychometrically sound instrument. This indicates that the SEBS is a valid, reliable, responsive self-efficacy of balance instrument when evaluating young, active individuals. Study three demonstrated the relationships between selfefficacy of balance and self-reported measures of function, and objective measures of balance. These relationships revealed that while lower extremity function and some measures of balance influence scores of the SEBS, they do not account for all of the variability of the SEBS. This finding further supports the claim that balance behavior is changing as function and postural control change. Therefore, future research should include investigation regarding the utility of the SEBS, as well as longitudinal studies to establish effectiveness of identifying individuals at a higher risk of sustaining a lower extremity injury.

Geography and the Environment / Studies of the Amazon drainage network have primarily focused on the Western Basin and the Amazon Cone, but they have neglected the integration between these areas. Data presents a time gap in the Amazon’s development and the forces responsible for the organization of the drainage network are poorly understood. A key element towards gaining an improved awareness of the Amazon is the Eastern Amazon River Valley. The focus of this study is an 80,000 km² portion of this area. An integrated method is adopted that combines terrain information derived from a digital elevation model with geologic data. The interpretation of DEM data is unique to this study. Seven distinct surfaces were identified, along with numerous erosional environments. This observation supports a geomorphologic record of numerous erosional events starting in the Miocene. This finding is significant as it rejects previous models for staircase-like terraces for the Amazon, and establishes a timeline for the development of geomorphologic landforms in the study area. In addition, neotectonics events provide an alternative explanation to the generation of topography in the study area. It was concluded that geomorphology in the study area is the result of physical and chemical weathering, and modified by neotectonics. These findings provide alternative means for Amazon landscape evolution. / text

<p>Syftet med vårt examensarbete är att skapa ett informationsmaterial för nyinflyttade i Västerås kommun som så många som möjligt ska kunna ta del av. Vårt mål är att både lässvaga och lässtarka människor ska känna sig lika betydelsefulla när de läser informationsmaterialet. Vår forskningsfråga är därför: Går det att kombinera principerna för informationsdesign och principerna för lättläst för att nå både en lässvag och en lässtark grupp så att båda känner sig lika viktiga och tar till sig budskapet? Och om det går, hur kan man då gå tillväga?</p><p>Vår uppdragsgivare är Centrum för lättläst som arbetar med att göra information tillgänglig för dem som har svårt att läsa. De behöver ett utprovat referensmaterial av ett lättillgängligt informationsmaterial som de kan visa upp för olika kommuner i sitt arbete mot ett tillgängligt samhälle.</p><p>För att besvara vår forskningsfråga använder vi oss av litteraturstudier, samt kvalitativa och kvantitativa studier i form av utprovningar. Resultaten från utprovningarna är avgörande för hur informationsmaterialet bearbetas och färdigställs.</p><p>Vår slutsats för examensarbetet är att principerna för informationsdesign och principerna för lättläst är en bra kombination för att göra ett informationsmaterial tillgängligt. För att veta hur tillgängligt ett material är krävs utprovningar på olika målgrupper. Varje målgrupp har sina egna behov och det är omöjligt att tillfredställa <em>alla</em> med ett och samma informationsmaterial. Våra utprovningar visar däremot att det går att nå flera <em>olika</em> målgrupper med ett och samma informationsmaterial.</p>

A new retrieval algorithm has been developed based on the Optimal Estimation (OE) approach, which retrieves lognormal aerosol size distribution parameters from multiwavelength aerosol extinction data, as measured by the Stratospheric Aerosol and Gas Experiment (SAGE) II in the lower stratosphere. Retrieving these aerosol properties becomes increasingly more difficult under aerosol background conditions, when tiny particles (« 0.1 µm) prevail, to which the experiment is nearly or entirely insensitive. A successful retrieval algorithm must then be able (a) to fill the 'blind spot' with suitable information about the practically invisible particles, and (b) to identify 'the best' of many possible solutions. The OE approach differs from other previously used aerosol retrieval techniques by taking a statistical approach to the multiple solution problem, in which the entire range of possible solutions are considered (including the smallest particles) and characterized by probability density functions. The three main parts of this thesis are (1) the development of the new OE retrieval algorithm, (2) the validation of this algorithm on the basis of synthetic extinction data, and (3) application of the new algorithm to SAGE II measurements of stratospheric background aerosol. The validation results indicate that the new method is able to retrieve the particle size of typical background aerosols reasonably well, and that the retrieved uncertainties are a good estimate of the true errors. The derived surface area densities (A), and volume densities (V ) tend to be closer to the correct solutions than the directly retrieved number density (N), median radius (R), and lognormal distribution width (S). Aerosol properties as retrieved from SAGE II measurements (recorded in 1999) are observed to be close to correlative in situ data. In many cases the OE and in situ data agree within the (OE and/or the in situ ) uncertainties. The retrieved error estimates are of the order of 69% (σN), 33% (σR), 14% (σS), 23% (σA), 12% (σV), and 13% (σReff ). The OE number densities are generally larger, and the OE median particle sizes are generally smaller than those N and R retrieved by Bingen et al. (2004a), who suggest that their results underestimate (N) or overestimate (R) correlative in situ data due to the 'small particle problem'. The OE surface area estimates are generally closer to correlative in situ profiles (courtesy of T. Deshler, University of Wyoming), and larger than Principal Component Analysis (PCA) retrieval solutions of A (courtesy of L. W. Thomason, NASA LaRC) that have been observed to underestimate correlative in situ data by 40-50%. These observations suggest that the new OE retrieval algorithm is a successful approach to the aerosol retrieval problem, which is able to add to the current knowledge by improving current estimates of aerosol properties in the lower stratosphere under low aerosol loading conditions.

Section 1: Introduction, Section 2: Physical Features, Section 3: Biological Resources, Section 4: Social/Economic Characteristics, Section 5: Important Resources, Section 6: Watershed Classification, Section 7: Watershed Management, Section 8: Local Watershed Planning, Section 9: Nine Key Elements, Appendix A: Subwatershed Classification, Appendix B: Selected References, Appendix C: RUSLE, Appendix D: AGWA / Fact sheet "Hydrologic Requirements of and Evapotranspiration by Riparian Vegetation along the San Pedro River, Arizona" - http://pubs.usgs.gov/fs/2006/3027/ / San Pedro Data Browser - http://www.epa.gov/nerlesd1/land-sci/san_pedro/

Elderly recreational vehicle campers are attracted to the Lower Colorado River area during the winter season. Their numbers have grown in recent years and many are seeking alternatives to the usual practice of establishing residence in private trailer parks. As a result, various public land sites in the region are being subjected to concentrated winter use. Units in these camping areas represent users who are retired couples or individuals on fixed or limited incomes, living in "self-contained" campers, travel trailers or motor homes. Some of these visitors are utilizing designated campgrounds; others are squatting on the public domain where there are few, if any, sanitary or other facilities. The impact of elderly winter visitors on the public land resource of the Lower Colorado River basin area is varied. An understanding of environmental effects is important, but proposed solutions depend upon our ability to understand the people causing environmental deterioration. Answers have been sought to basic questions about winter visitor characteristics and behavior. The findings were applied toward the development of basic policy recommendations pertinent to appropriate public land management for the desert areas of the Southwest. Of theoretical interest was the evaluation of the relative importance of camping socialization experiences in explaining user behavior. Data were gathered from 580 visitor units during the winter of 1973-74 with a personal interview schedule. Important classes of variables included socio-economic characteristics, camping experience, and users' campground behavior and preferences. Interviews were conducted in seven sites representing various kinds of public and private camping facilities in the region. Discriminant function, correlational, multiple regression and bivariate analyses were utilized to render the collected data meaningful. The basic sub-groups in the sample were distinguished by significant differences in various socio-economic and experiential characteristics. The most important of these were income, education, age, value of mobile quarters, and pre-retirement adult camping experience. Length of stay in public land camping areas was not explained by differences in site characteristics. Differences in visitor characteristics accounted for 40-50% of variation in length of stay. Important predictor variables included income, age, average annual pre-retirement camping experience and the amount of previous recreational vehicle camping without utility and sewerage hookups. Support was evidenced for a basic theoretical orientation: that post-retirement behavior is, in part, a reflection of pre-retirement recreational socialization and leisure life style patterns and persistence. The results suggested certain implications for public land management. Recommendations include the desirability of moving elderly winter camper use to sites away from the Colorado River. High fees imposed along the river would discourage extended-stay winter use and restore a unique resource to the short-term water-oriented visitor. The establishment of a spectrum of "inland" camping sites with varying levels of facilities and fees would serve as a positive inducement to the older winter camper, and restore some order to what has been, in some areas, an uncontrolled camping environment. A public campground on Bureau of Land Management land in Why, Arizona, offers a possible solution to the problems posed by the limited resources available to most public land management agencies. There a parcel of public land has been leased by a non-profit community association and developed into a public campground with basic facilities for elderly winter visitors. Management expenses are met through the imposition of a modest graduated fee schedule which favors the extended-stay camper. In this case a squatting problem has been resolved through local initiative; the public land management agency, with its limited budget, has been spared the expense of development and that of direct management responsibility.

This paper develops a Bayesian Global VAR (GVAR) model to track the international transmission dynamics of two stylized shocks, namely a supply and demand shock to US-based safe assets. Our main findings can be summarized as follows. First, we find that (positive) supply-sided shocks lead to pronounced increases in economic activity which spills over to foreign countries. The impact of supply-sided shocks can also be seen for other quantities of interest, most notably equity prices and exchange rates in Europe. Second, a demand-sided shock leads to an appreciation of the US dollar and generally lower yields on US securities, forcing investors to shift their portfolios towards foreign fixed income securities. This yields sizable positive effects on US output, equity prices and a general decrease in financial market volatility. / Series: Department of Economics Working Paper Series