A novel active material for controllable, high work density applications was designed, fabricated, analyzed, and tested. This active material uses a lens-shaped element to implement simple shear motion with gas pressure actuation. The lens element is a bladder-filled Kevlar fabric embedded in a polyurethane matrix. The polyurethane’s hyperelastic material parameters were found by experiment and estimated by numerical analysis. The Ogden material constant set found shows good agreement within the shear actuator’s working range. A fabricated, single-element shear actuator reached 34.2% free shear strain when pressurized to 1.03 MPa. A unitary shear actuator was modeled as were single-acting and dual-acting shear actuator arrays so that solitary and multi-cell behaviors were estimated. Actuator work performance and power from nonlinear finite element analysis found conventional work density is 0.2289 MJ/m3 and 0.2482 MJ/m3, for the singleacting and double-acting shear actuator, respectively. Scientific work densities are 0.0758 MJ/m3 and 0.0375 MJ/m3, for single-acting and double-acting shear actuators, respectively. Calculation shows the volumetric power for a single-acting shear actuator is 0.4578 MW/m3 and 0.4964 MW/m3 for the double-acting shear actuator. Finally, a nastic actuator is applied to twist a generic structural beam. The nasticmaterial actuated structure has an advantage over conventional actuator systems. Work per unit volume for nastic materials is 2280~8471% higher than conventional, discrete actuators that use electric motors. When compared by work per unit mass, this nastic actuator is 2592~13900% better than conventional actuator because nastic actuator is made from lighter materials and it distributes the actuation throughout the structure, which eliminates connecting components. The nastic actuator’s volumetric power is 2217~8602% higher than conventional actuators. Finally, the nastic actuator is 2656~14269% higher than conventional actuators for power per unit mass.

This thesis endeavors to develop a new locking method for a twisted morphing wing spar. The conventional wing has to have hinges and a discontinuous surface. These cause air separation that decreases aerodynamic performance. Unlike this old concept, the new airfoil comprises a square cross section spar into the wing blade. Twisting the spar changes the airfoil?s angle of attack to control lifting and thrust force without a discontinuous surface. A nastic actuator generates shear stress for twisting the spar. A thermoplastic polymer locks the twisted shape. Applying heat and solidifying the polymer makes the beam lock into the twisted position even after removing the shear stress. This concept was evaluated by computer simulation and an experiment with a prototype construction. The analysis with 5m long spar shows that +450Pa shear stress generated +2 degrees twist and maximum 1.49MN/m spring constant at the spar tip. This spring constant helps a designer select the locking material, Ultem. The analysis proves that the Ultem film?s shear spring constant is high enough to hold the aluminum spar?s spring back. Physical experiment conditions might differ from computer simulation because environmental limitations might be present. The prototype spar has to be less than 300mm long to fit in an electric oven. Tension made the beam twist and baked it with locking material. When the polymer softened, the beam was taken from the oven and cooled. The solidified locking material held the spar at twisted status. The observation shows no detectable spring back after removing tension. Analytic solution also presents no spring back in twisting the prototype section spar. The FEA of the section spar verifies the physical experiment results. As a normal polymer, the Ultem shows stress relaxation. The load drop affects deceasing elastic modulus. Subsequently, the Ultem is able to lock the twisted spar even after the relaxation.

When the Era of Knowledge-based Economy approaching, the knowledge is considered a key factor in corporate competitiveness, knowledge sharing play a critical role in an organization knowledge management. The enterprise must through the fast learning system to establish the competitive ability,and will continual readjustment step by the drastic change environment.Due to increasing uncertainly on organization change,political behaviors become active in organization.Therefore,it has some kind of subtle relations between the perceptions of organizational politics¡Bknowledge sharing and organizational changing satisfaction.The research discusses about the correlation analysis of them. This research was proceeded by questionnaire to the sampling objects of five industries in Taiwan.That includes Hospitality Industry,Telecommunication Industry,Manufactory Industry and Transportation Industry.The results indicated¡G 1¡BPerceptions of organizational politics have a significant negative relationship with knowledge sharing. 2¡BPerceptions of organizational politics have a significant negative relationship with organizational changing satisfaction. 3¡BOrganizational changing satisfaction have a significant positive relationship with knowledge sharing. 4¡BOrganizational changing satisfaction mediates the effect between perceptions of organizational politics and knowledge sharing. 5¡BSome of the individual variables have significant difference on the perceptions of organizational politics¡Bknowledge sharing¡Borganizational changing satisfaction.

In this dissertation, I examine binocular 3D motion processing through a series of psychophysical and neuroimaging experiments aimed at uncovering the neural computations involved and their interaction with the known hierarchy of visual motion processing. Two primary binocular cues could be used to compute 3D motion: one based on changing disparities over time (CD), the other based on interocular velocity differences (IOVD). Under normal viewing conditions, both cues coexist and (potentially) provide the same 3D direction information, yet whether CD, IOVD, or both mechanisms exist has distinct implications for how 3D motion is processed along the visual stream. First, I measured 3D direction discrimination sensitivity is measured for isolated binocular cues under a range of 3D motion speeds and visual eccentricities. Comparison of isolated-cue sensitivity to corresponding combined cue sensitivity (i.e. concurrent IOVD & CD cue stimuli) provided an estimate of relative cue contributions under normal viewing conditions. Second, I conducted a series of motion adaptation experiments to differentiate the neural representation of 2D and 3D directions of motion, and examine the degree to which IOVD or CD mechanisms can account for 3D motion adaptation. Third, I examined the neural locus of 3D motion processing by measuring 3D direction- selectivity throughout a range of visual cortical areas using functional neuroimaging in an event-related paradigm that parallels psychophysical adaptation experiments. Finally, I discuss the broader implications for the neural mechanisms of binocular 3D motion processing and future experimental directions. Together, these results reveal that: (1) the IOVD cue is the dominant cue to 3D motion processing across the majority of natural speeds & eccentricities, (2) neural tuning for 3D motion is distinct from 2D motion and can be fully explained by an IOVD mechanism, and (3) the IOVD cue is computed relatively late in the visual processing stream, in areas MT & MST— cortical areas primarily associated with 2D/retinal motion and thought to be beyond the point of binocular combination. The significance of IOVD —but not CD—cues to 3D motion perception motivates a drastic modification to canonical models of motion processing to include the late-stage comparison of eye- specific motion signals. / text

As the nation’s schools continue to increase in diversity, teachers are faced with numerous challenges regarding how to meet the needs and strengths of diverse student populations. In addition, small, rural schools tend not only to lack in resources, but may not be adequately prepared to understand student backgrounds, unable to support diverse learners' social and cultural well-being, especially those consisting of a homogenous, Caucasian staff. This qualitative case study examined one small, rural school’s response to a changing demographic, particularly in its Latino student population. Specific attention was given to teachers' attitudes, views, and perceptions regarding their Latino student learners. Faculty members' interviews served as the primary data collection method coupled with an examination of current school documents and notes from a researcher's journal. The three data collection methods provided insight into the research questions: 1) how does a small, rural school respond to its changing demographic, particularly in its Latino student population?; and 2) What are the views, perceptions, and attitudes of staff members regarding the school's Latino student population? The major findings suggest that the school displayed evidence of increased support in The major findings suggest that the school displayed evidence of increased support in resources are still necessary to effectively meet the needs and strengths of diverse learners within the school. At times, the evidence revealed teachers not taking responsibility of diverse learners' needs and strengths, placing blame on outside factors. Additionally, faculty members offered many examples of students' needs, but had difficulty identifying students' strengths. Staff members held narrowed views of what inhibited student learning and did not possess a thorough understanding of culturally responsive teaching practices. Also, teachers' and administrators' views varied from those they perceived of their colleagues; and lastly, generalizations latent with pity were evident in some responses. The results of the research contribute to the contemporary literature regarding teacher belief systems regarding diverse learners, how they perceive students of color, and how understanding these perceptions might help educators devise practices that will more successfully meet diverse learners' needs and strengths. Current research lacks in teacher perspectives; this research intends to add to the existing dialogue. / text

Products are priced in order to sell them and make a profit. Every firm, therefore, needs a pricing strategy. Such a strategy should be simple. It should ensure simplicity in tactics and decisions and minimize complications. It is difficult to set a price with the help of only one pricing model. The price of a product may vary due to factors like geographical area, different clients and time difference. Prices must always be cost-compatible. An essential step in deciding on a pricing strategy involves looking at the characteristics of pricing decisions. The classic economic theory is based upon demand and supply and attempts to balance these two concepts. In most cases it works on the basis of cost plus profit. This way of thinking about prices does not guarantee a profit, because costs and profit depend upon volume and volume is dependent on the correct price. Prices can be cut at first. In this way only a small profit will be ensured. If the price is too low it will not automatically ensure a profit. Usually little attention is paid to the market itself in deciding on a price. It is not an easy task to arrive at the 'envelope of acceptable prices". Not to fall into the standard trap of adding profit to cost, one has to have a broad overview of pricing strategies. Multiple approaches are followed in determining prices. Firstly, one can look at cost and its characteristics. By adding a profit margin to cost, one can determine a new price. It may be too low or it may be too high, resulting in the risk that customers will buy the competition's product. It is there for essential to look at strategic concepts like the competition's price as well. The way a buyer looks at certain prices and then decides whether to buy or not, also plays a very important role. All of these factors have to be taken into consideration and all aspects have to be balanced to arrive at a price. A framework for pricing decisions includes the recognition of the need for a pricing decision, determining a price, developing a model, identifying and anticipating pricing problems, developing feasible courses of action, forecasting the outcomes of each alternative and monitoring and reviewing the outcome of each action. Management's pricing decision is taken after studying all this information. Information can be given as a single answer or in detail. Costs can be divided into direct costs and absorption costs. Although prices can be determined in more ways than one, the ideal is to take more than one factor into consideration. Every aspect must carry a weight and these weights can be changed. That is why the multiple criteria decision method is so effective. With this method a few factors are taken into account. Each of these factors adds to the price definition in a certain manner with regard to each product. By changing the profit margin, the price can be adjusted until one is satisfied with the new price. A company's structure, location and nature will play a role in determining which technique is used to determine a price. The best technique is one that can be adjusted and where multiple criteria can be set. The choice of a technique is a personal choice. The multi-criteria method is flexible and prices can be determined uniformly for all products or for a single product. / Thesis (M.Sc. (Computer Science))--North-West University, Potchefstroom Campus, 2004.

In today’s educational world various debates and processes of alternation concerning the issues of Technological Training take place not only in Lithuania but throughout the world. The most essential problem, which demands to make certain decisions immediately, is related to the development of the said subject and increasing of its desirability within school communities. Most of the countries are searching of optimum name for that subject, which would correspond to its suggested purport and still remain within the scope of its main goals. Those goals were created in many years and they reflect their serving to the interests of the state and society, helping to preserve the identity, culture, traditions, and manners of the country that form the creative and professional capabilities of a person. On the one hand, the reasons that determine one or another paradigm of technological training fail to give grounds of the scope and objective of the technological training, therefore the more thorough studies are necessary. The newly created conception does not make references to technological training in Latvia, Sweden, Austria, Poland, and Malta. Due to that reason it is important to investigate the experience of those countries and at the same time to realise the conception of technological training, social-economic conditions, which make a great influence of technological training, and compare the findings with the programme and content of technological training existing in... [to full text]

Diplominio darbo tema- ,,Metamorfozės“. Šiuolaikiniame pasaulyje viskas sparčiai keičiasi, kinta, tobulėja, transformuojasi, galiausiai sunyksta, pasimiršta, senus vėl keičia nauja. Viskas sukasi užburtu ratu. Darbo tikslas- savo darbe spalvomis, šviesa, šešėliu perteikti savo jausmus, patirtas emocijas, pajausti piešinio ritmą. Sukurti abstarkčią kompoziciją, jos erdvę, panaudojant savo rankų darbo piešinį, bei jį radikaliai keičiant naudojant skaitmeninę atlikimo techniką. Lyriškai ir poetiškai atskleisti savo fantazijų pasaulį remiantis metamorfozės apibrėžimu. Mano darbą sudaro trijų dalių paveikslų ciklas, atliktas tušu, pieštukais, vėliau transformuojamas, atliekamas skitmenine technika. Pasirinkus temą, buvo ilgi kūrybiniai ieškojimai iki galutinio rezultato. Mano darbuose vaizduojami reiškiniai, kuriuos galima matyti aplink save. Uždaviniai: 1. Išanalizuoti teorinius šaltinius, apžvelgti ir charakterizuoti optinį meną, pasaulio pasikeitimus, deformacijas. 2. Apžvelgti temos pasirinkimo motyvus. 3. Pasirinkti menininkus, kurių darbais galėsiu remtis. 4. Pritaikyti studijų metu įgytas žinias. 5. Aprašyti bandymų, ieškojimų kelią, bei atlikimo technikas. 6. Atlikti kūrybinį darbą, sukurti darbų ciklą ir jį aprašyti. 7. Savo darbu įrodyti, kad metamorfozės gali vykti kūrybiniame procese. 8. Pateikti teorinę medžiagą apie temos pritaikymą pedagoginiame darbe. 9. Pateikti išvadas. Metodai: duomenų rinkimas, įvairios literatūros analizė... [toliau žr. visą tekstą] / Bachelor‘s works thesis, in metamorphosis. In today's world is rapidly changing, changing, evolving, transforming, and finally dies, I'm forgotten, replaced the old new again. Everything is turning a vicious circle. The aim of our work, colors, light and shadows to convey your feelings, emotions incurred, feel the rhythm pattern. Create abstract composition, the space, using your hand-drawing, and it is radically changing the use of digital technique. Lyrically poetic and disclose their fantasy world based on the definition of metamorphosis. My work consists of three parts of the cycle of paintings, done with ink, pencil, later transformed conducted skitmenine technique. Selecting a topic has been long creative quest to the end result. My work depicts events that you can see around you. Objectives: First To analyze the theoretical sources, review and characterize the optical arts, global changes in deformation. Second Review the topic choice. Third Select artists whose works will be able to rely on. 4th Apply the knowledge acquired during their studies. 5th Describe the tests, the way quests, and performance techniques. 6th Perform creative work, a series of works and is described. 7th Through their work, to show that metamorphosis can be a creative process. 8th A theoretical material on the subject application pedagogical work. 9th A conclusion. Methods: Data collection, analysis of various literature and information sources, an overview of the creative... [to full text]

The purpose of this study was to investigate the effectiveness of support provided by District-Based Support Teams (DBSTs) to learners experiencing barriers to learning in the Free State province. The study focused specifically on the implementation of the changed role of the DBSTs as proposed by the Education White Paper 6 in 2001. This was a two-phased study involving a literature study and empirical research. The first phase of this study focused on a literature study undertaken on topics such as the history of learner support in South Africa, the previous role of Education Support Services at school and school district level and different education documentation and policy documents relating to the topic. Furthermore the literature study explored the ecosystemic approach to learner support specifically focusing on Bronfenbrenner‘s ecological systems theory and Epstein‘s model of human development. The second phase of the study comprised empirical research. A quantitative approach was used to collect data with a little element of the qualitative approach just to verify some information. For the quantitative component of the research, a questionnaire consisting of both closed and open-ended questions was administered, while for the qualitative component, the researcher held some interviews with participants selected randomly at first, but with a snowball effect. The research was conducted in all the districts of the Free State Department of Education. The data collected revealed that the implementation of the proposed changes to learner support is in fact subdued due to various problems experienced by District Based Support Teams. These problems hamper the effective implementation of the changes set out in various education policy documents. The study contributes to the practice of learner support by proposing a model for the DBSTs to implement their changed roles. / PhD, Learner support, North-West University, Vaal Triangle Campus, 2012

Products are priced in order to sell them and make a profit. Every firm, therefore, needs a pricing strategy. Such a strategy should be simple. It should ensure simplicity in tactics and decisions and minimize complications. It is difficult to set a price with the help of only one pricing model. The price of a product may vary due to factors like geographical area, different clients and time difference. Prices must always be cost-compatible. An essential step in deciding on a pricing strategy involves looking at the characteristics of pricing decisions. The classic economic theory is based upon demand and supply and attempts to balance these two concepts. In most cases it works on the basis of cost plus profit. This way of thinking about prices does not guarantee a profit, because costs and profit depend upon volume and volume is dependent on the correct price. Prices can be cut at first. In this way only a small profit will be ensured. If the price is too low it will not automatically ensure a profit. Usually little attention is paid to the market itself in deciding on a price. It is not an easy task to arrive at the 'envelope of acceptable prices". Not to fall into the standard trap of adding profit to cost, one has to have a broad overview of pricing strategies. Multiple approaches are followed in determining prices. Firstly, one can look at cost and its characteristics. By adding a profit margin to cost, one can determine a new price. It may be too low or it may be too high, resulting in the risk that customers will buy the competition's product. It is there for essential to look at strategic concepts like the competition's price as well. The way a buyer looks at certain prices and then decides whether to buy or not, also plays a very important role. All of these factors have to be taken into consideration and all aspects have to be balanced to arrive at a price. A framework for pricing decisions includes the recognition of the need for a pricing decision, determining a price, developing a model, identifying and anticipating pricing problems, developing feasible courses of action, forecasting the outcomes of each alternative and monitoring and reviewing the outcome of each action. Management's pricing decision is taken after studying all this information. Information can be given as a single answer or in detail. Costs can be divided into direct costs and absorption costs. Although prices can be determined in more ways than one, the ideal is to take more than one factor into consideration. Every aspect must carry a weight and these weights can be changed. That is why the multiple criteria decision method is so effective. With this method a few factors are taken into account. Each of these factors adds to the price definition in a certain manner with regard to each product. By changing the profit margin, the price can be adjusted until one is satisfied with the new price. A company's structure, location and nature will play a role in determining which technique is used to determine a price. The best technique is one that can be adjusted and where multiple criteria can be set. The choice of a technique is a personal choice. The multi-criteria method is flexible and prices can be determined uniformly for all products or for a single product. / Thesis (M.Sc. (Computer Science))--North-West University, Potchefstroom Campus, 2004.