Thesis (Ph. D.)--University of Wisconsin--Madison, 1957. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Bibliography: leaves 122-128.

Thesis--University of Wisconsin--Madison. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 254-263).

Bakgrund: Ett lager är en viktig del av de flesta värdekedjor. Stora ansträngningar har därför under de senaste åren gjorts för att finna optimala strategier för planering och kontroll av lagersystem. För att uppnå en ökad produktion krävs det att kapacitetsutnyttjandet förbättras. Genom att planera sin kapacitet kan företag reducera kapacitetsbegräsningar, så kallade flaskhalsar, som är nyckeln till att förbättra produktionens kapacitetsutnyttjande. Syfte: Syftet med studien är att beskriva Staples nuvarande kapacitetsutnyttjande i påfyllnads- och plockprocessen. Vidare avser studien att identifiera kapacitetsbegränsningar inom dessa processer. Därefter ämnar studien att finna de bakomliggande orsakerna till dessa kapacitetsbegränsningar samt hur de kan förbättras. Metod: Det har genomförts ostrukturerade intervjuer, semi-strukturerade intervjuer, deltagande observationer samt insamling av kvantitativ data. Inledningsvis genomfördes en processkartläggning i syfte som ett verktyg för resterande delar av studien. Vidare utfördes beräkningar för att finna flaskhalsar i produktionen och intervjuer för att identifiera störningsmoment inom flaskhalsarna. Slutligen presenterades ett antal förbättringsförslag. Slutsatser: Efter genomförda beräkningar framgick att Staples idag inte utnyttjar sin kapacitet maximalt, dock är maximal kapacitet är en nivå som inte anses vara rimlig. Det framgick att Staples har ett kapacitetsbortfall på grund av att det finns en differens mellan nominell kapacitet och bruttokapacitet. Slutsatsen drogs att följande tre aktiviteter utgör flaskhalsar i Staples verksamhet; godsmottagning, plock ZtZ (plock av framförallt tyngre och otympliga artiklar) och plock PTS (detaljplock). Inom dessa flaskhalsar påträffades ett antal störningsmoment som till stor del har grund inom deiiiteoretiska områdena som Stevenson (2009), Slack et al. (2012) och Bergman och Klefsjö (2012) benämner som anläggning och teknik samt metod. Vidare fastslogs att en svårighet finns i att ge kortsiktiga förbättringsförslag för dessa störningsmoment. Detta på grund av studiens tidsram samt att det berör ämnen utanför studiens omfattning. Det presenteras dock tre scenarier för att hitta en fördelaktig fördelning av kapacitet mellan PTS och ZtZ. Dessa scenarier bygger på tre tidsintervaller för hur produktionen är igång samt två plockhastigheter. Baserat på att PTS:en innehar en större andel aktiva arbetstimmar och en högre plockhastighet är scenario 3 mest fördelaktigt eftersom det krävs att ZtZ är minst verksam. / Background: A warehouse is an important part of most value chains. Great effort has in recent years been made to find optimal strategies for planning and control of storage system. In order to achieve a higher production it requires the capacity utilization to be improved. By planning its capacity, companies can reduce capacity constraints, so-called bottlenecks, which is the key to improving the production’s capacity utilization. Purpose: The aim of this study is to describe Staples current capacity utilization in the filling and picking process. Furthermore, the study aim to identify capacity constraints in these processes. Then, the study intends to find the causes of these capacity constraints and how they can be improved. Method: There have been unstructured interviews, semi-structured interviews, participant observation and collection of quantitative data. Initially there was a process mapping in purpose of a tool for the remaining study. Further calculations were performed to find bottlenecks in the production and interviews to identify disturbances in the bottlenecks. Finally, a number of suggestions for improvement where presented. Conclusions: Calculations revealed that Staples is currently not using their capacity to the maximum, altough this is not a level considered reasonable. It appeared that the company has a capacity shortfall when there was a difference between the nominal capacity and gross capacity. It was concluded that the following three activities constituted bottlenecks in Staples; receiving, picking ZtZ (picking of particularly heavy and bulky items) and picking PTS (detail picking). Within these bottlenecks, there was a number of disturbances found that largely had their basis in the teoratical areas Stevenson (2009), Slack et al. (2012) and Bergman and Klefsjö (2012) terms as facility and technology and method. Furthermore, it was established a difficulty in providingvshort-term improvement suggestions to these disturbances. This’s because of the study's time frame and that it reach subjects outside the scope of the study. However, three scenarios are presented to find a favorable allocation of capacity between PTS and ZTZ. These scenarios are based on three time intervals for how production is running and two picking speeds. Based on that the PTS holds a higher proportion of active working hours and a faster pick-speed scenario 3 is the most beneficial because it requires that ZTZ is least active.

The dissertation examines topics related to the formation of supercapacitors using plasma technology and their analysis. Plasma spray technology was used to form supercapacitors electrodes. Carbon was deposited on stainless steel surface using the atmospheric pressure argon-acetylene plasma. The deposition of nickel oxide on the surface of carbon electrodes was made using magnetron sputtering method. The influence of acetylene amount to the supercapacitors electrodes and the electrical characteristics of the structure were estimated. The nickel oxide influence to the electrical parameters of supercapacitor carbon electrodes, structure and microrelief was assessed too. The etching of carbon electrodes surface with oxygen plasma was performed and its impact on the capacitors electrical parameters and carbon electrode structure was evaluated. Mathematical modeling was used to theoretically estimate the influence of oxygen plasma to the supercapacitor carbon electrode surface microrelief. The anisotropic growth of carbon surface relief and isotropic surface erosion mechanism was theoretically explained. The impact mechanism of the acetylene content and plasmatron power to the carbon electrode structure and electrical parameters was qualitatively explained. The mechanism for understanding the influence of NiO content on the carbon electrodes to the supercapacitor electrical parameters and electrode structure was proposed. / Disertacijoje nagrinėjama tematika yra susijusi su superkondensatorių formavimu ir jų tyrimais naudojant plazmines technologijas. Superkondensatorių elektrodams formuoti panaudota plazminio purškimo technologija. Anglis ant nerūdijančio plieno paviršiaus užnešta panaudojant atmosferinio slėgio argono-acetileno plazmą. Nikelio oksidui nusodinti ant anglies elektrodų paviršiaus panaudotas magnetroninio garinimo metodas. Įvertinta acetileno kiekio įtaka superkondensatorių elektrinėms charakteristikoms ir elektrodų struktūrai. Tai pat įvertinta nikelio oksido kiekio įtaka superkondensatorių anglies elektrodų elektriniams parametrams, struktūrai bei mikroreljefui. Atliktas anglies elektrodų paviršiaus ėsdinimas deguonies plazma ir įvertintas jo poveikis kondensatorių elektriniams parametrams ir anglies elektrodų struktūrai. Matematiniu modeliavimu teoriškai įvertinta deguonies plazmos įtaka superkondensatorių anglies elektrodų paviršiaus mikroreljefui. Teoriškai pagrįstas anglies dangos reljefo anizotropinis augimas ir izotropinės paviršiaus erozijos mechanizmas. Kokybiškai paaiškintas acetileno kiekio ir plazmotrono galios įtakos mechanizmas anglies elektrodų struktūrai ir elektriniams parametrams. Pasiūlytas mechanizmas, aiškinantis NiO kiekio, esančio ant anglies elektrodų, įtaką superkondensatorių elektriniams parametrams ir elektrodų struktūrai.

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Methods of determining pile toe capacity for both small displacement driven steel piles and drilled sockets were collected. Working in conjunction with a local consulting firm, records of previous pile driving sites were collected. A process to determine quality data for use in this work was developed by the author including information from geotechnical site investigations, pile driving records and pile driving analysis records. By plotting unconfined compressive strength of rock versus measured ultimate pile toe capacity of these piles, a best fit line of 7.5qu and a series of confidence intervals were established for the site records. This best fit line was compared to all of the previously reviews design methods for calculating ultimate pile toe capacity. Rehnman and Broms (1971) was determined to be the most effective existing method while most of the methods for drilled sockets were overly conservative when applied to small displacement driven steel piles.

The objective of this study is to estimate the airport capacity in the National Airspace System (NAS). Previous studies have focused on the airport capacity of large commercial airports. This research study estimates the runway capacity for more than two thousand airports in the NAS in order to understand future tradeoffs between air transportation demand and supply. The study presented in this report includes capacity estimates for general aviation and commercial airports. To estimate airport runway capacity, the Federal Aviation Administration (FAA) Airfield Capacity Model (ACM) is used to assess the capacity at all candidate airports in a target airport set. This set includes all airports with potential Very Light Jet (VLJ) operations. The result of the study provides a broad view about the airport capacity in the future air transportation system, and could help decision makers with a modeling framework to identify congestion patterns in the system. Moreover, airport capacity is an important limiting factor in the growth of air transportation demand. The main motivation in our analyis is to include airport capacity constraints in forecasts of air transportation demand. The framework described in this report has been integrated into the Transportation Systems Analysis Model (TSAM). TSAM is a comprehensive intercity and multimode transportation planning tool to predict future air transportation demand. / Master of Science

Published Article / This paper intends to argue that there are two inherent challenges and dilemmas that may incapacitate rising calls to develop a distinguished cohort of researchers at universities, including CUT. Firstly, it seems the episteme knowledge-base in research of the current cohort of staff members does invite a look in askance as to its depth and breadth. Do we sufficiently exude competence to develop budding researchers of note? Secondly, and deducing from my informal interviews and discussions with B.Ed Honours students since 2006; we somewhat fall short as lecturers to model the quintessential research expertise necessary to develop the students' phronetic research experiences - the success of which would reconcile with their practical reality in their diverse teaching and learning situations and circumstances. How then do we build a research capacity that catapults us from this somewhat research doldrums in the School of Teacher Education at CUT to become a School of Teacher Education recognised nationally and internationally as a School of Teacher Education which is enveloped in the validity and reliability of generating quality research? This paper explores various "givens' and "intellectual needs." And, quite academically, may rumble about conceptual and perceptual impediments and hurdles which under-gird the laborious exercise of undertaking research; though fulfilling to academic autarkical pride when done excellently.

The primary objective of this work is to develop and demonstrate a steady-state stochastic simulation method to estimate the PV hosting capacity of a given distribution, based on the ANSI voltage regulation standard. The work discusses the key factors that determine the voltage rise due to distributed PV. Load demand analysis is done to determine statistically representative minimum daylight load demand for PV analysis. And lastly, the steady-state, stochastic simulation method is discussed and implemented to estimate the PV hosting capacity for small-scale and large-scale PV Deployments. / text

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