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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.
21

Probabilistic Assessment of Pile Drivability in Swedish Soils

ALINEJAD KORDMAHALLEH, MAEDEH January 2020 (has links)
Site investigations are often performed prior to the design of pile foundations with the aim to collect data regarding soil properties including boulder content. The obtained data is typically limited due to non-homogeneous characteristic of the soil. The geological conditions of the Mälardalen region are characterized by glacial and post glacial clay overlaying on the layer of moraine containing boulders on a bedrock. Thus, pile refusal in results of encountering boulders is a common issue during pile driving in this region. The current methods to assess the pile refusal risk are mostly qualitative and relies on the expertise gained from experience.This thesis aims to develop a numerical model to quantify the boulder content in a soil strata with a confidence interval based on the site investigation results. Furthermore, this study estimates the probability and the consequences of hitting boulders while installing piles.The model simulations show that an increase in the boulder content raises the probability of hitting a boulder, but it is not proportional to the diameter of piles. It means that even in low rate of boulder content with small piles there is a high probability to hit a boulder. Results from simulations using simplified quantitative method show that slender piles have substantial consequences in case they encounter boulders. Thus, these piles are more prone to pile refusal or breakage. It is suggested that in projects where small piles are preferred due to the superstructure design, enough tests be performed to have an estimate of boulder content with tighter interval and more precise design. On the other hand, in projects with low pile counts, it is recommended to have a conservative design with large diameter piles instead of performing numerous in-situ tests. This is because the price for piling becomes relatively low compared to site investigations’ cost.
22

A study of stream temperature using distributed temperature sensing fiber optics technology in Big Boulder Creek, a tributary to the Middle Fork John Day River in eastern Oregon

Arik, Aida D. 08 November 2011 (has links)
The Middle Fork John Day Basin in Northeastern Oregon is prime habitat for spring Chinook salmon and Steelhead trout. In 2008, a major tributary supporting rearing habitat, Big Boulder Creek, was restored to its historic mid-valley channel along a 1 km stretch of stream 800 m upstream of the mouth. Reduction of peak summer stream temperatures was among the goals of the restoration. Using Distributed Temperature Sensing (DTS) Fiber Optic Technology, stream temperature was monitored prior to restoration in June 2008, and after restoration in September 2008, July 2009, and August 2009. Data gathered was used to determine locations of groundwater and hyporheic inflow and to form a stream temperature model of the system. The model was used both to develop an evaluation method to interpret components of model performance, and to better understand the physical processes important to the study reach. A very clear decreasing trend in surface temperature was seen throughout each of the DTS stream temperature datasets in the downstream 500 m of the study reach. Observed reduction in temperature was 0.5°C (±0.10) in June 2008, 0.3°C (±0.37) in September 2008, 0.6°C (±0.25) in July 2009, and 0.2°C (±0.08) in August 2009. Groundwater inflow was calculated to be 3% of the streamflow for July 2009 and 1% during the August 2009 installation. Statistically significant locations of groundwater and hyporheic inflow were also determined. July 2009 data was used to model stream temperature of the 1 km (RMSE 0.28°C). The developed model performance evaluation method measures timelag, offset, and amplitude at a downstream observed or simulated point compared with the boundary condition, rather than evaluating the model based on error. These measures are particularly relevant to small scale models in which error may not be a true reflection of the ability of a model to correctly predict temperature. Breaking down model performance into these three predictive measures was a simple and graphic method to show the model's predictive capability without sorting through large amounts of data. To better understand the model and the stream system, a sensitivity analysis was conducted showing high sensitivity to streamflow, air temperature, groundwater inflow, and relative humidity. Somewhat surprisingly, solar radiation was among the lowest sensitivity. Furthermore, three model scenarios were run: a 25% reduction in water velocity, a 5°C increase in air temperature, and no groundwater inflow. Simulations of removal of groundwater inflows resulted in a 0.5°C increase in average temperature over the modeled time period at the downstream end, further illustrating the importance of groundwater in this stream system to reduce temperatures. / Graduation date: 2012
23

Barefoot Running: Feeling the World Through Your Feet

Warnock, Carly 13 August 2013 (has links)
This thesis paper explores barefoot and minimalist running in Ottawa, Ontario and Boulder, Colorado. The objective has been to answer the following questions: how can we understand barefoot and minimalist style running as cultures, how are barefoot and minimalist style running being done in different ways, how do the senses play out and create nuances between barefoot and minimalist style runners. I argue barefoot and minimalist running are distinct cultural forms. I applied an Ingoldian notion of culture that contends cultures are generative, relational, temporal and improvisational. I conducted a multi-site study and I interviewed participants, as well as conducted participant observation. My findings reveal that the different sensations experienced by the two styles of running make them meaningful in different ways. These different sensations and ways of meaning create nuances between barefoot and minimalist running and differentiate them and as a result, there are found to become different cultural forms.
24

Barefoot Running: Feeling the World Through Your Feet

Warnock, Carly January 2013 (has links)
This thesis paper explores barefoot and minimalist running in Ottawa, Ontario and Boulder, Colorado. The objective has been to answer the following questions: how can we understand barefoot and minimalist style running as cultures, how are barefoot and minimalist style running being done in different ways, how do the senses play out and create nuances between barefoot and minimalist style runners. I argue barefoot and minimalist running are distinct cultural forms. I applied an Ingoldian notion of culture that contends cultures are generative, relational, temporal and improvisational. I conducted a multi-site study and I interviewed participants, as well as conducted participant observation. My findings reveal that the different sensations experienced by the two styles of running make them meaningful in different ways. These different sensations and ways of meaning create nuances between barefoot and minimalist running and differentiate them and as a result, there are found to become different cultural forms.
25

Podnikatelský záměr / Business Plan

Štencl, František January 2010 (has links)
This master’s thesis deal with processing of business plan for the establishment of boulder&bar. Prospectus project results from accumulated information, analysis of present state of specialization and arises from finding of market opportunity.
26

Polyfunkční dům v Uherském Hradišti / Multifunctional house in Uherské Hradiště

Hanák, Martin Unknown Date (has links)
THE AIM OF THIS DIPLOMA´S THESIS IS A NEW BUILDING OF A MULTIFUNCTIONAL HOUSE IN UHERSKÉ HRADIŠTĚ. THE BUILDING HAS THREE FLOORS AND ONE PARTLY UNDERGROUD FLOOR. THE UNDERGROUND FLOOR IS USED AS A STORAGE SPACE FOR THE BULDING‘S USERS AND AS A TECHNICAL SURROUNDINGS OF THE FACILITY. FIRST FLOOR IS USED AS A COMMERCIAL PREMISES, AS A BOULDER CENTRUM, COFFEE HOUSE AND SALES. THERE ARE SEVEN APARTMENT UNITS ON EACH FLOOR 1+KK, 2+KK, 3+KK AND 4+KK. OVERALL THERE ARE FOURTEEN APARTMENT UNITS, ALL FLATS ARE DESIGNED IN THE SAME WAY ON EACH FLOOR. THE WHOLE BUILDING IS ALSO EQUIPPED WITH A LIFT, IT IS A MASONRY BUILDING MADE WITH YTONG SYSTEM WITH CAST-IN-PLACE REINFORCED CONCRETE CEILING AND A FLAT GREEN ROOF. THE CONSTRUCTION ITSELF FITS IN THE SURROUNDINGS OF THE HOUSING DEVELOPMENT.
27

Deconstructing the Fourth Wall: Immediacy in Performative Architecture

Hunsaker, Carrie Elizabeth 21 August 2008 (has links)
No description available.
28

[pt] AVALIAÇÃO DO COMPORTAMENTO DE ESCAVAÇÃO GRAMPEADA INSTRUMENTADA EM SOLO DE PEDREGULHO / [en] EVALUATION OF THE BEHAVIOR OF AN INSTRUMENTED SOIL NAILED EXCAVATION IN GRAVEL SOIL

FERNANDO CHAVEZ CARMEN 01 February 2022 (has links)
[pt] Nos últimos anos na cidade de Lima as escavações profundas alcançaram uma presença maior, devido à recente demanda pela construção de edifícios altos e centros comerciais com vários níveis de subsolos, onde utilizam-se preferencialmente as cortinas atirantadas para a contenção dos solos. No entanto, a técnica de solo grampeado mostra-se como uma alternativa interessante, dado que também permite fornecer suporte lateral e limitar os movimentos do solo. A técnica consiste em reforçar o bloco do solo atrás da parede através das inclusões passivas, criando uma estrutura de gravidade consistente que permite aumentar a resistência geral ao cisalhamento e restringir os deslocamentos. Este estudo de caso procura avaliar os deslocamentos horizontais em uma escavação de 15m de altura em um entorno urbano, onde o solo é predominantemente de pedregulho denso mal graduado, parte do depósito aluvial do Conglomerado de Lima. A estimativa dos parâmetros de resistência baseou-se em ensaios de cisalhamento direto in situ em grande escala e ensaios de arrancamento encontrados na literatura. O acompanhamento dos deslocamentos ao longo do processo construtivo, foi realizado a través de inclinômetros instalados no perímetro, em locais estratégicos para avaliar os deslocamentos mais críticos na escavação. A avaliação de erros sistemáticos em inclinômetros é também abordada no estudo. Complementarmente, realizaram-se análises numéricas com programas de equilíbrio limite e elementos finitos, que permitiram avaliar os fatores de segurança e os deslocamentos com o objetivo de comparar os dados de campo com os resultados calculados. Através de análise paramétrica e calibração do modelo foi possível conhecer a influência dos parâmetros geotécnicos e geométricos de escavações profundas grampeadas. / [en] In recent years in the city of Lima, the execution of deep excavations growth, due to the recent demand for the construction of high-rise buildings and shopping malls having various levels of basements, where anchorage walls systems are preferably used to soil retention. However, the soil nailing technique is an interesting alternative, by reason to provide lateral support and limit movements. The soil nailing technique consists of reinforcing the soil block behind the wall through passive inclusions, producing a consistent gravity structure that allows the increas of the shear strength and restricting displacements. This case study aims to evaluate the horizontal displacements generated in a 15m high deep excavation in an urban environment, where the existing soil is predominantly of poorly graded dense gravel, component of the alluvial deposit of the Lima Conglomerate. The estimate of strength parameters for this type of soil was based on large-scale in situ direct shear tests and pullout tests found in the literature. The monitoring of displacements throughout the construction process was carried out using vertical inclinometers installed on the perimeter, in strategic locations to assess the most critical displacements that the excavation could experience. The evaluation of systematic errors in inclinometers is also approached in the study. In addition, numerical analyzes were carried out with limit equilibrium and finite element programs, which allowed evaluating the safety factors and displacements in order to compare the field data with the calculated results. Through parametric analysis and model calibration, it was possible to know the influence of geotechnical and geometric parameters of nailed deep excavations.
29

Evaluating the East Java Tsunami Hazard: What Can Newly-Discovered Imbricate Coastal Boulder Accumulations Near Pacitan and at Pantai Papuma, Indonesia Tell Us?

Meservy, William Nile 01 October 2017 (has links)
Our paleotsunami surveys of the southern Java coast led to the discovery of five imbricate coastal boulder fields near Pacitan, Indonesia that may date to the mid-to-late 19th century or prior and two similar fields at Pantai Papuma and Pantai Pasir Putih that were tsunami-emplaced during the 1994 7.9 Mw event in East Java. Estimated ages for the fields near Pacitan are based on historical records and radiocarbon analyses of coral boulders. The largest imbricated boulders in fields near Pacitan and in East Java are similar in size (approximately 3 m^3) and are primarily composed of platy beachrock dislodged from the intertidal platform during one or several unusually powerful wave impactions. Hydrodynamic wave height reconstructions of the accumulations near Pacitan indicate the boulders were likely tsunami rather than storm-wave emplaced, as the size of the storm waves needed to do so is not viable. We evaluate the boulders as an inverse problem, using their reconstructed wave heights and ComMIT tsunami modeling to suggest a minimum 8.4 Mw earthquake necessary to dislodge and emplace the largest boulders near Pacitan assuming they were all deposited during the same tsunami event and that the rupture source was located along the Java Trench south of Pacitan. A combined analysis of historical records of Java earthquakes and plate motion measurements indicates a seismic gap with >25 m of slip deficit along the Java Trench. A 1000-1500 km rupture along the subduction interface of this segment is capable of producing a 9.0-9.3 Mw megathrust earthquake and a giant tsunami. However, evidence for past megathrust earthquake events along the this trench remains elusive. We use epicenter independent tsunami modelling to estimate wave heights and inundation along East Java in the event that the trench were to fully rupture. By translocating ComMIT slip parameters of Japan's 2011 9.1 Mw event along the trench offshore East Java, we demonstrate possible wave heights in excess of 20 m at various locations along its southern coasts. Approximately 300,000-500,000 people in low-lying coastal communities on the southern coasts of East Java could be directly affected. We recommend at-risk communities practice the "20/20/20 principle" of tsunami hazard awareness and evacuation.
30

南極から美ら海まで : 14C年代測定をはじめて45年

Omoto, Kunio, 小元, 久仁夫 03 1900 (has links)
第23回名古屋大学年代測定総合研究センターシンポジウム平成22(2010)年度報告

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