A distributed hash table (DHT) is a type of peer-to-peer (P2P) network that, like traditional hash tables, maps keys to values. Unlike traditional hash tables, however, the data is distributed across a network with each node being responsible for a particular range of keys. Numerous other DHTs have been presented and have become the cornerstone of wildly popular P2P file-sharing applications, such as BitTorrent. Each of these DHTs trades-off the number of pointers maintained per node with the overhead and lookup time; storing more pointers decreases the lookup time at the expense of increased overhead. A Grouped Hamming Network (GHN), the overlay network presented in this thesis, allows for the number of pointers per node to be any increasing function of n, P(n) = Ω(log n). The system presented assumes that nodes fail independently and uniformly at random with some probability q = 1 − p. Three different schemes for routing in a GHN are presented. For each routing scheme a theoretical estimate on the probability of failure is given and optimal configurations in terms of n and P(n) are given. Simulations of GHNs with various configurations indicate that the given estimates are indeed accurate for reasonable values of q and that the optimal configurations are accurate.

Irrigation rates in excess of plant evapotranspiration requirements have been identified as a major contributor to the development of raised water tables in the City of Lethbridge. These high water tables have created problems such as coulee slope instability, basement flooding and structural instability. This study characterized water table conditions in Lakeview subdivision, an area that experiences basement flooding. Soil texture data from this subdivision is used to address speculation that geologic controls contribute to high water tables in the city of Lethbridge, Linear regression analysis comparing mean sand and clay fractions to mean water table depth revealed that variations in soil texture have no statistical relationship to variations in water table depth. Glacio-lacustrine sediments underlie Lakeview subdivision while tills predominate in the Varsity Village area. Lakeview subdivision is also approximately 20 years older than Varsity Village and the two are compared to gain some understanding of how water tables develop over time. Comparison of mean water table depths in irrigated and non-irrigated land cover classes in both Varsity Village and Lakeview revealed a significant difference in Varsity Village whilc Lakeview showed no statistical difference. Finally, a water scheduling program is developed to decrease or reduce the build-up of water tables and alleviate some of the problems that result. / x, 169 leaves : ill. ; 29 cm

<p>Results from this study enables a better understanding of groundwater surface water interactions in the TMG, particularly regarding aquatic ecosystems. It has also highlighted the necessity to do proper impact assessments before proceeding with bulk abstraction from this important aquifer. The results also demonstrated the importance of differentiating between real groundwater and non-groundwater discharge contributions to surface hydrology and where these interface areas are located.</p>

Bakalaurinis darbas – kosmetinis staliukas ,, Femina” (moteris), įgyvendintas remiantis vaizdine bei teorine informacija, surinkta analizuojant XXI a. būdingas sėdimųjų baldų tendencijas, pastarojo meto kūrybines koncepcijas, konstrukcijas bei medžiagas. Šiuo laikmečiu ypač aktualus tampa baldų daugiafunkcionalumas, formų lakoniškumas ir išbaigtumas, pritaikomumas įvairiose erdvėse, atitikimas vartotojo lūkesčius baldo išvaizdai, racionaliam erdvių panaudojimui. Darbe apžvelgiami ir analizuojami šiuolaikiniai baldų formos ir technologiniai sprendimai, baldų gamybos medžiagos, žinomiausi dizaineriai. Surinkta teorinė ir vaizdinė medžiaga tampriai siejasi su išsikelta baigiamojo darbo kūrybine idėja. Pateikiama suprojektuoto ir įgyvendinto baldo vaizdinė medžiaga ir teorinis aprašas, jame nusakant gaminio koncepciją, pagrindžiant meninį sprendimą, jam pagaminti naudojamas medžiagas, bei technologijas. Kūrybinių paieškų tikslas - sukurti stilingą šiuolaikinį baldą - kosmetinį staliuką, siekiant išgauti vientisą, išbaigtą formą, harmoningą spalvinį derinį. Įgyvendintas dizaino objektas gali būti pritaikytas privačiuose ir visuomeniniuose interjeruose, eksponuojamas parodinėse erdvėse. / Bachelor work - a cosmetic table,, Femina” (woman), implemented on the basis of theoretical and visual information gathered by the analysis of the twenty-first century typical seating trends of recent creative concepts, designs and materials. In this era of furniture is especially important multifunctionality offurniture, laconic forms and completeness of applicability in various areas, matching the user expectations of the appearance of the furniture, the rational use of space. At work reviewed and analyzed modern forms of furniture and technology solutions, furniture, construction material, most famous designers. Collected theoretical and visual material is closely related to the thesis set in a creative idea. Presented designed and implemented furniture reproductions and theoretical description of the product, it implying the concept of supporting an artistic decision, it is made using materials and technologies. Search for creative purpose - to create a stylish modern furniture - dressing table, in order get a single and complete form, harmonious color combination. Completed table can be adapted to private and public interiors, exposed in gallery spaces.

At Uddeholm AB, they today use two overhead cranes with chains to move and tilt steel sheets for visual inspection of surface defects. The tilting is done to give the operator a better view of these defects using reflection of light. The problem with this approach is that it is combined with danger of life with hanging load, in case a chain breaks. Therefore Uddeholm AB would like to develop a tilt table that can be mounted on their lift table they use today. To solve this problem, 5 concepts was developed using a product development process. The chosen concept was further developed into a product that met the defined load case to tilt the sheets, weighing up to 20 tonnes, 55 degrees. The design that was selected use two points of rotation and is driven by three hydraulic cylinders. The structure has been calculated by hand and with the structural mechanics software Ansys. To tilt the table a complete hydraulic system was developed and dimensioned. The hydraulic system has been calculated by hand and simulated by a computer program called Hopsan developed at Linköping University. / På Uddeholm AB använder man idag två traverser med kedjor för att flytta och tilta stålplåtar för syning av ytdefekter. Tiltningen sker för att operatören lättare ska kunna se dessa defekter med hjälp av ljusreflektioner. Problemet med detta arbetssätt är att det är förenat med fara för liv med hängade last då en kedja skulle kunna gå av. Därför vill Uddeholm AB ha hjälp att utveckla ett tiltbord som kan monteras på deras lyftbord som används idag. I detta arbete togs det fram 5 koncept med hjälp av en produktutvecklingsprocess för att lösa problemet. Ett koncept valdes som utvecklades till en produkt som klarar det definierade lastfallet att tilta plåtar som väger upp till 20 ton 55 grader. Den valda designen som valdes använder två rotationspunkter och drivs av 3 hydraulcylindrar. Konstruktionen beräknades för hand och med strukturmekanikprogrammet Ansys. För att driva konstruktionen utvecklades och dimensionerades även ett komplett hydraulsystem. Hydraulsystemet har beräknats för hand och simulerats av ett datorprogram som kallas för Hopsan som utvecklats vid Linköpings universitet.

In many studies efforts are made to decrease the energy consumption of trains by optimizing their drive style, e.g. accelerate and brake optimally and regenerate electricity when braking. In other studies the goal is to distribute the run time between stations in an optimal way to decrease the energy consumption, given a relatively simple drive style. In this report the goal is to combine these two energy saving methods to obtain as low energy consumption as possible. By coupling one software containing a drive style optimizer with another software which by different optimization methods calculates the optimal run time distribution on a given track this is accomplished. The study also contains a comparison between drive styles, with the goal to find a relatively simple but energy efficient drive style. Finally the dependence between run time distribution and energy consumption is further analysed. The results show that by redistributing the run times the energy consumption can be decreased compared to previously existing time tables. They also show that a relatively simple drive style gives comparable energy consumption compared to the one obtained using a drive style optimizer. Finally the results show that the dependence between run time and energy consumption can be approximated with a simple second order equation.

This thesis traces the history of the London Round Table group and of the Round Table magazine from their origins in 1909-10 until the decision to launch a "new" Round Table in 1966. It takes as its focus the ideas put forward by members of the group, in the Round Table and elsewhere, on a range of Imperial and international problems. It utilises knowledge on the authorship of Round Table articles in order to clarify the processes by which Round Table policy was made, and the role of different individuals within the group. It examines the rôle of the Round Table as a pressure group for Imperial reform and in particular its relationship to Empire federalism, seeking to elucidate the extent to which it was able to act coherently, and attempting to describe its aims, methods and influence. On the question of federalism, the thesis finds an inability to agree on details, but also a continuing belief in the necessity for constitutional unit until the late 1940s. It suggests that this belief was not entirely unrealistic. The thesis argues that, despite differences of emphasis, the Round Table was able to develop a distinctive ideology of Imperialism which was strongly supportive of the Imperial rôle yet also responsive to the need for change. It finds that the group was only briefly influential on government policy, under Lloyd Georfge's administration, but it argues that the group saw its main purpose as that of influencing long-term opinion rather than short-term policy. It suggests that the group was able to play an important mediating rôle, between conservatism and radicalism, and between policy-making and opinion.

Two series of tests were performed in summer 1993 and repeated in summer 1994 to investigate effects of potassium, calcium and water table depth on mechanical properties of tomato fruit. In the first group of tests five mechanical properties stress, strain, ER (ratio of stress to strain at break), energy and toughness were calculated from the force-deformation curve obtained by compression of pericarp disks taken from tomato fruits (cv New Yorker) at the breaker stage. In the second group of tests force, deformation and energy were obtained from puncture tests on whole tomato fruit. The textural parameters were used to compare the effects of the potassium, calcium and water level depths on the mechanical properties of tomatoes. Results showed the effects of calcium and water table depths on the mechanical properties were significant. Tomato fruits exposed to increasing moisture stress levels by increasing water table depth exhibited increased firmness. Increased application of calcium also resulted in increased firmness. Application of different potassium levels had in general no significant effect on breaking stress, strain, ER, energy and toughness of tomato fruit pericarp. / A new method of measuring skin strength of tomatoes is described. The method, refered to as loop method, overcame the problems with the existing method using mechanical grips. Further, the loop method was applied to measure the effect of potassium and calcium on skin strength of tomato. Using the loop method, data were collected on relaxation of tomato skin (epidermis). A computer program was written to model th tensile stress relaxation behaviour of tomato skin. The program was employed to calculate linear and non-linear coefficients of a relaxation model. The fitted values were in a very good agreement with experimental data (R$ sp2>$0.99).

A three year field study was undertaken to assess the influence of water table management, namely subsurface irrigation and controlled drainage, on the movement of pesticides through the soil profile into ground water. The herbicides under investigation were prometryn on an organic soil, and metolachlor on a sandy soil. Both soil and groundwater were collected and analyzed. The results presented are those obtained in the first two years of the project. / In the organic soil, herbicide leaching was greatly reduced due to the management of the water table. The pesticide remained higher in the soil profile, preventing leaching to the drains and allowing degradation. / The opposite effect appeared to have occurred in the sandy soil. The higher water table resulting from subsurface irrigation may have induced the leaching of the contaminant into lower soil levels and into the ground water. The high water solubility of the herbicide metolachlor, in conjunction with low microbial activity, may have played a role in this phenomenon.

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