The Hydro Muscle is a soft linear actuator which utilizes hydraulic pressure and elastic properties of its core for actuation. The Hydro Muscle has been recruited to actuate bio-inspired robot systems using a classic set point tracking feedback control system. A more efficient method is to develop a model-based control system which uses a dynamic model of the Hydro Muscle. The dynamic behavior of the Hydro Muscle which describes the relation between the forces exerted to the resultant motion can be studied with the help of a dynamic viscoelastic model. A dynamic viscoelastic model defines the force exerted by the Hydro Muscle as a function of the hydraulic pressure, the tensile expansion of the Hydro Muscle and the rate of its tensile expansion. Multivariable linear regression is employed to generate a model to relate fluid pressure, tensile expansion, and the rate of tensile expansion to the force exerted by the Hydro Muscle. The developed model can be utilized to implement a model-based control algorithm for the force control of individual joints. This model-based control design could be extended to systems involving multiple Hydro Muscles to allow for a modular control system. The design and test of multi-fiber Hydro Muscle actuated biologically inspired ankle is considered to study control strategies for multi-fiber system. A set-point tracking control algorithm with a proportional differential controller is used to minimize the tracking error. Modular force variation with sequential recruitment of Hydro Muscle is studied.

This dissertation studies the effects of external integration and internal liberalization on the economic geography within a country when regions within the country have different access to the world market. The first paper introduces internal geography into the Melitz (2003) model to examine how external and internal liberalizations affect the economic geography within a country. By dividing a country into a coastal region and an inland region, the model shows that trade leads the coastal region have a higher than proportional share of industry, and causes firms in the coastal region to be larger and more productive than firms in the inland region. Both external and internal liberalizations encourage industry agglomeration in the coastal region. However, external trade liberalization leads to firm divergence, and internal liberalization leads to firm convergence, between coastal and inland regions. This allows me to test the relative importance of internal and external liberalization. Using Chinese data from 1998 to 2007, I find that the manufacturing sector grew faster in the coastal region than in the inland region after the WTO accession in 2001. Firms also converged between coastal and inland regions, indicating that internal liberalization had stronger effects during this period. In the second paper, I document large economic discontinuities across the east/non-east provincial borders in China and argue that the border effects are largely due to preferential policies that give the east advantages in international trade and economic development. Using counties contiguous to the borders of 4 plain provinces, I find that manufacturing activities (output, employment, and export) increase abruptly from the west to the east of the borders. The counties in the east also have a lower share of agricultural population and a higher share of output by foreign firms. The economic discontinuities are larger for non-state sectors than for the state sector and are stronger in non-mountain regions than in mountain regions. The large economic discontinuities are unlikely to be explained by geographic and cultural differences across the borders, and can be accounted for by the policy differences between east and non-east provinces. I find that the openness level and the index of market liberalization can account for a large part of the east/non-east divide. In the third paper, I use the ending of the Multi-fiber Arrangement (MFA) to study the effects of an external trade liberalization on Chinese textile and clothing industry. After the Multi-fiber Arrangement ended in 2005, Chinese textile and clothing exports in products that faced quotas before experienced significant boom. The effects are stronger in the coastal region than in the inland region. Using distance to the seaport as a measure of world-market access, I show that the external trade liberalization (the quota removal) had larger effects on regions with better access to the world market. A further analysis of firm entry shows that the large adjustment of export after the expiration of the MFA was largely due to destination and product expansions by existing firms.

Master of Science / Department of Apparel, Textiles, and Interior Design / Joy Kozar / This study examines colonization, development, and globalization in the Commonwealth of the Northern Mariana Islands (CNMI) with respect to the garment industry, the main industry of the islands. A broad-reaching analysis examined population, gender, economic factors, and import/export data in order to explore the repercussions of garment industry development and subsequent decline on the CNMI. A quantitative analysis was conducted utilizing data from the United States Census Bureau, the CNMI's Department of Commerce, and the U.S. Department of Commerce Office of Textiles and Apparel. This research illustrates how the effects of the garment industry in small developing nations are dramatically impacted by a trade arrangement, the Multi-Fiber Arrangement (MFA), which was a protectionist measure used to restrict manufacturing of certain product through a quota system. In addition, this study reveals the economic implications and societal outcomes for the CNMI after the collapse of the garment industry as a result of the 2005 MFA phase-out. Garment production orders shifted to large producer nations once quota restrictions were no longer in place. Factory closures, lost business revenue, and a loss of manufacturing positions affecting predominantly women plagued the CNMI as well as cost-of-living increases. Federalization of the CNMI took place in 2009 which further complicated the islands’ politics and guest worker population status. Tourism is now the CNMI's chief industry although its growth is dismal and heavily reliant upon world economies. A comparison between Mauritius, another small island nation, concludes the discussion with insight on women's development and future considerations for economic growth as a means of development and dependency in the CNMI.

The objective of this thesis is to provide a complete pipeline that achieves an accurate reconstruction of the white matter fascicles using clinical diffusion images characterized by a low angular resolution. This involves (i) a diffusion model inferred in each voxel from the diffusion images and (ii) a tractography algorithm fed with these local models to perform the actual reconstruction of fascicles. Our contribution in diffusion modeling is a new statistical distribution, the properties of which are extensively studied. We model the diffusion as a mixture of such distributions, for which we design a model selection tool that estimates the number of mixture components. We show that the model can be accurately estimated from single shell low angular resolution diffusion images and that it provides specific biomarkers for studying tumors. Our contribution in tractography is an algorithm that approximates the distribution of fascicles emanating from a seed voxel. We achieve that by means of a particle filter better adapted to multi-modal distributions than the traditional filters. To demonstrate the clinical applicability of our tools, we participated to all three editions of the MICCAI DTI Tractography challenge aiming at reconstructing the cortico-spinal tract from single-shell low angular and low spatial resolution diffusion images. Results show that our pipeline provides a reconstruction of the full extent of the CST.

L'objectif de cette thèse est de fournir une chaine de traitement complète pour la reconstruction des faisceaux de la matière blanche à partir d'images pondérées en diffusion caractérisées par une faible résolution angulaire. Cela implique (i) d'inférer en chaque voxel un modèle de diffusion à partir des images de diffusion et (ii) d'accomplir une ''tractographie", i.e., la reconstruction des faisceaux à partir de ces modèles locaux. Notre contribution en modélisation de la diffusion est une nouvelle distribution statistique dont les propriétés sont étudiées en détail. Nous modélisons le phénomène de diffusion par un mélange de telles distributions incluant un outil de sélection de modèle destiné à estimer le nombre de composantes du mélange. Nous montrons que le modèle peut être correctement estimé à partir d'images de diffusion ''single-shell" à faible résolution angulaire et qu'il fournit des biomarqueurs spécifiques pour l'étude des tumeurs. Notre contribution en tractographie est un algorithme qui approxime la distribution des faisceaux émanant d'un voxel donné. Pour cela, nous élaborons un filtre particulaire mieux adapté aux distributions multi-modales que les filtres traditionnels. Pour démontrer l'applicabilité de nos outils en usage clinique, nous avons participé aux trois éditions du MICCAI DTI Tractography challenge visant à reconstruire le faisceau cortico-spinal à partir d'images de diffusion ''single-shell" à faibles résolutions angulaire et spatiale. Les résultats montrent que nos outils permettent de reconstruire toute l'étendue de ce faisceau. / The objective of this thesis is to provide a complete pipeline that achieves an accurate reconstruction of the white matter fascicles using clinical diffusion images characterized by a low angular resolution. This involves (i) a diffusion model inferred in each voxel from the diffusion images and (ii) a tractography algorithm fed with these local models to perform the actual reconstruction of fascicles. Our contribution in diffusion modeling is a new statistical distribution, the properties of which are extensively studied. We model the diffusion as a mixture of such distributions, for which we design a model selection tool that estimates the number of mixture components. We show that the model can be accurately estimated from single shell low angular resolution diffusion images and that it provides specific biomarkers for studying tumors. Our contribution in tractography is an algorithm that approximates the distribution of fascicles emanating from a seed voxel. We achieve that by means of a particle filter better adapted to multi-modal distributions than the traditional filters. To demonstrate the clinical applicability of our tools, we participated to all three editions of the MICCAI DTI Tractography challenge aiming at reconstructing the cortico-spinal tract from single-shell low angular and low spatial resolution diffusion images. Results show that our pipeline provides a reconstruction of the full extent of the CST.

The thesis “Effects of the Post Multi-fiber Agreement on Bangladesh Ready Made Garments Sector” is a part of our M.Sc. in Business Administration Program. The thesis paper on this topic is done under the supervision of Mr. Göran Alsén, Professor of Blekinge Institute of Technology (BTH) Ronneby, Sweden. In our country garment industry has been playing most vital role in our national economy, foreign exchange earnings, employment, growth in other sector and most prominently women employment. In the first chapter we tried to focus on the historical background of Multi Fiber Agreement, the growth of Bangladesh Garments Manufacturer and Exporter Association (BGMEA).In 1983 the total members of BGMEA were 143 with narrow export volume but in 2007 we see the total members are 4637.They contribute 75.64% of our total export (BGMEA, 2007). People who are directly involved with this sector became worried because of phase out of quota system from January 2005.But if we observe the current scenario it is very much positive for our national economy. It’s true that competition grew high but at the same time we can say that our garments industry did not lose its market reputation compared to that of other rival competitors like China, India, Sri Lanka, Vietnam etc. It’s very obvious that we have great problem with the backward linkage industry. As a result we are facing huge competition among the competitors. We have to face huge competition with the other competitors as long as we could set up our backward linkage industry. Under these circumstances, our Government is taking necessary steps to remove this problem. It is now simply a matter of time. But we hope we will get rid of this problem very soon. In this thesis paper we have tried to analyze the performance of five different RMG companies and we have also tried to examine the impact of withdrawal of quota system. Based on these five RMG factories we observe that our RMG industry is performing well after Post MFA. In addition, if we look our total exports we see that approximately 74.93% of our total export is from RMG sector. It is very promising sector compared to other export items. Thus we can say that to survive in this competitive sector our RMG sector should take some more necessary steps like improving employee efficiency, ensuring more training facility, emphasizing on backward linkage industry etc. To attract foreign investors these are very important.