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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

Connecting People In Motion

Johnson, Graesen Elisabeth 12 June 2024 (has links)
Perception of movement within and between designed spaces starts with the uniquely human ability to relate ourselves to our surroundings, followed by a relationship to the sequential experience of our movement throughout. Architecture is simply a building without the life and movement of the people who use the design, yet individuals may experience and relate to the same design differently. Habitual routes and repetitive paths of movement dull our experience of these spaces while moving towards or within a new space can allow our perception to expand as we take in a new environment, creating excitement but also tension within us. At our center, there is a phenomenological connection between a preceding space and personal orientation with a future space, helping us understand the new space in relation to ourselves, no matter the mode of transportation for arrival. Transportation hubs are intersections of time, connecting people in motion and guiding both habitual and unfamiliar subjects along their continuous journey. Studying the movement within the Washington metropolitan area, the New Carrollton Station in Maryland perforates the Capital Beltway as a gateway to the region. This thesis aims to understand how people interact with path-connected spaces and connect each subject's mode of arrival, goal, and choice of movement between a newly designed station. / Master of Architecture / With the uniquely human ability to relate ourselves to our surroundings, the way we experience moving through architectural and urban designs is impacted by the way we perceive the changing surrounding space. Architecture is simply a building without the life and movement of the people who use the building, yet individuals may experience and relate to the same building differently. Habitual routes, such as commutes that we do daily, may dull our experience of these spaces, while moving towards or being within a new building can open our senses and perception, taking in the new environment and creating excitement but also anxiety within us. At a psychological and phenomenological level, we can mentally connect the space where we just were with the new space we are in; our sense of direction works with our personal orientation of front and back, left and right. This is still the case if we arrive at a new place by bus or train: our orientation is in relation to the direction we are facing and what is in front of us when we get off. Transportation hubs/stations are designed to connect people in motion, guiding both habitual and unfamiliar riders along their continuous journey to a new place or mode of transportation. Studying the urban movement within the Washington metropolitan area, the New Carrollton Station in Maryland is located along the edge of the region, the Capital Beltway, and welcomes people to the region. This thesis aims to understand how people interact with architecture as they move throughout their daily lives and connect people as they move throughout a newly designed station.
32

Analys av fri stationsuppställning med totalstation med avseende på mätta längder och riktningar / Analysis of the configuration of free-station by totalstation regarding distance and direction observables

Broberg, Erik, Johansson, Robin January 2014 (has links)
Stationsetablering innebär bestämning av ett mätinstruments fysiska läge och orienterad riktning. I dagens bygg- och anläggningsbransch används nästan uteslutande fri station för att etablera en stationspunkt för mätningar. På en byggplats är tillgången till referensobjekt ofta begränsad. Instrumentets placering blir därför en kompromiss mellan tillgång till referensobjekt och tillgång till den plats där inmätning respektive utsättning skall ske. Denna kompromiss ger upphov till skiftande geometriska konfigurationer hos referensobjekten, vilka påverkar mätresultatet. Studiens syfte är att undersöka om simuleringar av fria stationsuppställningar i Svensk Byggnadsgeodesis (SBG:s) programvara Geo verifieras av fältmätningar och efterföljande beräkningar av osäkerhetsparametrar orsakade av konfiguration och mätta längder och riktningar. Delmål var att etablera ett testnät för att sedan genomföra simulering och fältmätning av fri stationsetablering mot. Analysen av fri stationsuppställning innefattade endast simulering och fältmätning i plan, med parametrarna X, Y och riktning. I samtliga konfigurationer verifieras simuleringarna av fältmätningarna genom att redovisade osäkerhetsellipser, till form och utbredning, överensstämmer. Detta innebär att genom simulering i SBG Geo kan svagheter i konfigurationer upptäckas och undvikas vid fältmätning, vilket är både tids- och resurssparande. Studiens slutsats är; Simulera mera. Simulering i SBG Geo visar god överensstämmelse med fältmätning och är där med ett effektivt planeringsverktyg för mätning samt att vid etablering av fri station bör referensobjekten placeras så att stationspunkten interpoleras för lägst osäkerhet. Faktorer att beakta vid fri station är, enligt studien: konfigurationen, mätningarnas kvalitet och att tillräcklig kontrollerbarhet (k-tal) föreligger / Station setup involves determination of the measuring instruments physical location and orientation. In today's construction industry free station is almost exclusively used to establish a station point for measurements. On a construction site, access to reference objects is often limited. The instruments placement therefore becomes a compromise between access to the reference objects and access to the site where surveying will take place. This compromise results in varying geometric configurations of the reference objects, which affect the results of the survey. This study aims to investigate whether the simulations of free station setups in Svensk Byggnadsgeodesis ( SBG's ) software Geo is verified by field measurements and subsequent calculations of uncertainty parameters caused by configuration and surveyed distances and directions. One objective of this study was to establish a test network of reference objects, which simulation and field measurement of free station were established against. The analysis of free station setup included only simulation and field measurement of plane surveying, with the parameters X, Y and direction. In all configurations, the simulations were verified by the field measurements by consistent corresponding of the shape of the error ellipses. This means that by simulation of SBG Geo, weaknesses in configurations can be detected and avoided during field survey, which saves both time and resources. Factors to consider when establishing free station is, according to the study: configuration, quality of the measurements and sufficient controllability (K-tal). The study concludes; simulate more. Simulation in SBG Geo show good representation of field measurements and is therefore an effective planning tool for field surveying. When establishing free station reference objects should be positioned so that the station point is interpolated for the lowest uncertainty
33

LIFE CYCLE ASSESSMENT of ERICSSON’s MANAGED RURAL COVERAGE SOLUTION / LIFE CYCLE ASSESSMENT of OFF-GRID SOLAR POWERED BASE STATION

KULTUR, BEGUM January 2013 (has links)
The total number of mobile subscriptions has been announced to reach 6 billion in the market, of which 4 billion are individual users. The rest of the people on earth are potential subscribers that mainly live in rural areas lacking mobile connectivity today. Many of these users do not have access to electricity and have 6 U.S. dollar per month (USD/month) of average revenue per person.   Referring to the year 2007, the telecommunication industry had a contribution of 0.6 percent of direct global carbon dioxide (CO2) or 0.4 percent of global carbon dioxide equivalent (CO2e). From 2007 to 2009, the number of off-grid radio base stations located in rural areas went up from 350,000 to 500,000. Nearly all of these sites use diesel generators and large amounts of fossil fuels during the operational stage. In addition the grid sites with diesel back-up were about 0.5 million in 2009. The financial and environmental consequences of the life cycle impact of the diesel fuel depleted can be significant. Adaptation of renewable energy has therefore become important for both environmental and economic reasons.   In this master thesis a Life Cycle Assessment of Ericsson’s Managed Rural Coverage (MRC) solution was made. Four main life cycle stages were included: manufacturing, transportation, operation and end-of-life treatment. MRC is an off-grid site solution consisting of electronic communication equipment (radio base station, base station controller, hub, cable) photovoltaic cells, battery, antenna, and constructions part (antenna pole, tower and foundation). This study also includes the satellite connection as well as Ericsson and operator activities in the assessment. The MRC distinguishes itself from the conventional base stations, by its significant decrease of energy consumption in its operational stage as well as the business model around the offering. The assessment in this thesis was carried out in accordance with data retrieved from an Ericsson’s pilot system in Dungunab, Sudan. The ISO 1404X series of LCA standards was followed and Gabi software w used to evaluate the results.   The carbon footprint was found to be 0.3 kg CO2e/subscriber for the pilot setup. These calculations were based on an assumption that each pilot site serviced 1000 users. The maximum number of subscribers can be about 3200, which would decrease the life cycle CO2 emissions per user by 2/3. According to the sensitivity analysis the maximum CO2 emissions for a conservative MRC scenario is less than 1 kg CO2e/subscriber. Although this figure represents a very conservative scenario, the result is low in comparison with an average GSM network which has an approximate carbon footprint of 15 kg CO2e/subscriber. It is important to note that the MRC is not intended to replace all conventional macro RBS sites due to limitations in performance and capabilities, but is rather a complement to conventional macro radio base station sites for applicable scenarios. / <p>Thesis registration number: EGI-2013-024MSC  EKV941</p>
34

A Small Telemetry System

Sanzhong, Li, Xianliang, Li, Qishan, Zhang 10 1900 (has links)
International Telemetering Conference Proceedings / October 28-31, 1996 / Town and Country Hotel and Convention Center, San Diego, California / A small PCM telemetry system designed for the flight test telemetry task of a new rotorcraft is introduced in this paper. It can provide a flexible frame format which is completely set up by user in advance, to meet the requirements needed in different flight testing phases. In this telemetry system, the data are low in rate and volume but very valuable with stringent quality and transmission accuracy. Data encrypting and channel encoding techniques are employed to guarantee the quality and security of the data. The system architecture based on microprocessors is adopted in order to process the data flexibly. Real-time data processing, monitoring and post-flight analysis are performed by PC type computers. All key components of the system may be programmed. The cost of the total system integration is relatively reduced.
35

THE PHILLIPS LABORATORY’S MOBILE GROUND TRACKING STATION (MGTS)

Stone, Christopher E., Flint, Keith D., Mathis, Gregory P. 11 1900 (has links)
International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, Nevada / Phillips Laboratory's Space Experiments Directorate (PL/SX) is operating and upgrading the laboratory's premier transportable satellite tracking station, the Mobile Ground Tracking Station (MGTS) program. MGTS supports orbital, suborbital, and aircraft missions as a range system capable of processing and recording multiple data streams. MGTS receives, processes, displays, and records satellite state-of-health data, infrared images in a variety of wavelengths, video data, and state vector solutions based on IR returns from the Miniature Sensor Technology Integration (MSTI) satellite program. The program has began in 1990 under BMDO sponsorship, with the intent to supplement existing test ranges with more flexibility in range operations. Wyle Laboratories and Systems Engineering and Management Company (SEMCO) provided the technical expertise necessary to create the first MGTS system. Autonomy and off-road capability were critical design factors, since some of the operations envisioned require deployment to remote or hostile field locations. Since inception, MGTS has supported the Lightweight Exo-Atmospheric Projectile (LEAP) sub-orbital missions, the MSTI satellite program, and Air Force wargame demonstrations. In pursuit of these missions, MGTS has deployed to White Sands Missile Range (WSMR), NM; Air Force Flight Test Center (AFFTC), Edwards AFB, CA; Vandenberg AFB, CA; Falcon AFB, CO; and NASA's Wallops Island Flight Facility, VA, to receive critical mission telemetry data conforming to both IRIG and SGLS standards. This paper will describe the evolution of the MGTS program, current hardware configurations and past and future mission scenarios for the MGTS team.
36

Global GPS networks and the determination of Earth Rotation Parameters

Symons, Leighton James January 1998 (has links)
No description available.
37

A report

Keevers, Mary Liz 01 December 1998 (has links)
This report discusses an internship at WDSU-TV New Orleans. The objective of the internship was to experience the production of a live segment in a daily television news show, and the challenges that go along with it.
38

Design Evaluation of a Duplex Circular Wet Well Pumping Station Under Steady State and Dynamic Operating Conditions

Mailloux, James Thomas 29 April 2010 (has links)
Duplex Circular Wet Well (DCWW) lifting pump stations are utilized for pumping clear and solid-bearing liquid. Understanding the effect of design criteria on pump performance is important to minimize maintenance costs and maximize efficiency. There are currently no known full-scale laboratory studies that have been performed to investigate the overall design of DCWWs. The objective of the research was to evaluate the impact of various design criteria, such as internal geometry and operating conditions on the performance of DCWW pump stations and provide documentation and recommendations which will be used to augment the current Hydraulic Institute/American National Standard for Pump Intake Design (ANSI/HI 9.8-1998), (HI) guidelines. The research was conducted in two phases; Phase 1 consisted of performing a comparative analysis of the basic flow patterns within the wet well by means of Computational Fluid Dynamics (CFD), Phase 2 consisted of performing detailed evaluations of various design aspects on pump performance using a full-scale Physical Model constructed for the research. The CFD research provided indications regarding potential performance problems that may occur due to poor flow patterns and potential pump suction swirl, while the physical research provided a basis for determining the relative advantages of different designs. The physical research included the evaluation of general flow patterns, free-surface and subsurface vortices, air entrainment and pump suction swirl. Measurement of the steady state swirl within the pump showed unacceptable performance in accordance with the HI acceptance criteria. Swirl data collected under real-world dynamic operating conditions showed that the pump typically did not experience the adverse conditions indicated at steady state. Normal (symmetrical) pump orientation resulted in more favorable operation in terms of pump swirl and ingestion of entrained air than a coplanar (inline) condition. A minimum water elevation was established to minimize air-entrainment and swirl entering the pumps, reducing possible effects such as cavitation and vibration of the pump impeller. Air-core subsurface vortices were present under the pumps, requiring pump-cones to be installed. The collection of real-time dynamic data will allow design engineers to better understand actual pump performance under normal cycling and clean-out modes, reducing the operating time under unfavorable conditions and overall maintenance requirements.
39

Introduktion i regleroptimering

Olsson, Camilla January 2003 (has links)
No description available.
40

The proposed resilience analysis methodology and its application to the SaskWater pumping station

Gao, Fei 14 April 2010
Resilience engineering first appeared as a new approach for both system design and system safety in the last decade. One of the first substantive publications on resilience as applied to engineering was Resilience Engineering: Concepts and Precepts [Hollnagel et al. 2006]. Hollnagel, Woods, and Leveson developed the basic concepts behind resilience engineering in order to understand and prevent tragedies such as the Columbia Challenger accident and the September 11 terrorist attack.<p> In its present stage, resilience engineering has several fundamental problems. 1. There is not an appropriate definition for resilience. 2. The differences between resilience and other similar concepts are not clarified. 3. There is no quantitative method which can measure resilience. The three questions need to be addressed in order to advance the concept of resilience engineering and form a theoretical concept to an applied science. These three issues then form the foundation of this thesis.<p> As a first step, a resilience definition is presented based on the concepts of system function and damage. Then, the differences between resilience and five similar concepts (reliability, robustness, repairing, redundancy, and sustainability) are clearly elaborated. As a last step, a method for quantifying resilience is proposed in the form of a resilience index. This method exclusively measures system resilience by analyzing the system recoverability from two points of view: reconfiguration and replacement of components.<p> In order to illustrate the approach to and definitions of resilience, an actual application is considered: a water pumping station operated by SaskWater in Saskatoon, Saskatchewan (the Clarence Booster Station). This pumping station is a complicated system consisting of mechanical electrical and chemical subsystems. The resilience of Clarence Booster Station is analyzed using the proposed definition of resilience and resilience index.<p> This thesis is just an initial step establishing a comprehensive definition (qualitatively and quantitatively) for resilience. The resilience index so defined in this work appears to have potential but much more scrutiny and refinement must be pursued to ensure that it is truly applicable to more universal engineering applications.

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