Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 33 for “"Chisel"”.
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Volcanic reconstruction of the paleoproterozoic powderhouse formation, Snow Lake, Manitoba, Canada: implications for controls on volcanogenic massive sulfide formation
… rhyolite domes are spatially associated with the Chisel, Chisel North, Lost, Ghost, Photo and Lalor deposits. The Chisel, Lalor and Lost members comprise the Powderhouse formation and are subdivided into thirteen lithologically and chemically distinct lithofacies and allows, for the first time, …
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Surface conditions effect on energy exchange at the soil surface
… three common management systems: moldboard plow, chisel plow, and no-tillage. Soil volumetric heat capacity was not significantly different in the surface 0.15-m depth increment for the three tillage systems. The apparent soil thermal diffusivity, as determined by harmonic analysis of soil …
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Tillage and cover cropping effects on soil properties and crop production
… into corn-soybean rotations under no-till and chisel till systems compared with fallow controls on soil attributes and crop yields after one complete rotation cycle. The experimental layout was a split split-block where whole plot treatments (phase of the rotation and year) had a Latin square …
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Simulating the Soil Erosion from Land Removed from CRP
… increase was indicated for soybean spring chisel and fall MB plow. For Brookings watershed, having existing soils and slope, sediment yield increased by 4.9 to 5.5 tons/ha per year while switching the land use from CRP to continuous com spring chisel plow or com-soybean spring chisel plow. …
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The Ballistic Response of Particle-Filled Elastomeric Systems
… geometries were considered (i.e., flat-nosed, chisel-nosed, and hemispherical) in order to note differences in the ballistic response of composites.
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INVESTIGATION OF SPOT WELDING ELECTRODE TIP WEAR AND A NON-DESTRUCTIVE TEST OF PLASTIC JOINING IN THE AUTOMOTIVE INDUSTRY
… where the weld is taken apart sometimes with a chisel. Once the weld is dismantled the quality can be analysed. During the course of this thesis the chisel test, and other comparable tests were carried out. The following thesis presents an overview of electrode current selection and its variance …
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Commercialization of a masonry tool designed in a senior-capstone class through a licensing agreement
… a rotary hammer attachment that guides the chisel bit as it moves within a mortar joint, was designed with the aim of improving the repointing work done by masons on brick exteriors. Given the real constraints on a team of soon-to-be graduating students and analysis of the market and the …
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Cover crops, tillage, and the suppression of soil borne diseases in soybean
… soybean yield. Two tillage treatments (chisel plow and ridge till) were also evaluated to determine whether these treatments had any effect on the microbial populations. Data of root disease severity and soybean yield were taken over the two seasons to determine the effectiveness of the …
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Desarrollo de una metodología para la medición de la rugosidad superficial del suelo
… para labrar los suelos: rodillo, rotovator y chisel. La aplicación de los métodos de interpretación de la rugosidad dio como resultado que el suelo de los Campos de Prácticas presenta una rugosidad superficial, una vez que se han pasado los aperos de labranza, que denota un suelo más …
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Machine-Learning-Based Non-Destructive Evaluation of Refractory Anchor Welds via Analysis of Percussion-Induced Acoustic Signals
… impacts—using tools such as a hammer and chisel—were applied to the exposed ends of these anchors. The resulting audio signals were recorded and transformed into Mel-Frequency Cepstral Coefficients (MFCCs). These MFCCs served as input features for multiple machine learning models including …
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Sketching in 3D : towards a fluid space for mind and body
… angles and works as a virtual tool like a chisel, plane, drill, and glue gun to shape virtual objects in 3-dimensional space. Testing these two prototypes for use, and comparing the resulting objects and user responses revealed the strengths and weaknesses of these different 3-dimensional …
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Conservation tillage methods for cabbage production
… and two types of strip tillage—Ro-till, RT, and chisel plow, CP) and three planting dates (early, mid and late) were compared in 1985 and 1986. Plants were set with a locally adapted no-till transplanter into a cover crop of cereal rye (<i>Secale cereale</i> L.). Under unusually rainy conditions …
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Stover, tillage, and nitrogen management in continuous corn for grain, ethanol, and soil carbon
… by at least 2, 12, and 19 kg N ha-1 for chisel, strip-till, and no-till, respectively. Greater nutrient use efficiency was also often observed with stover removal. In general, the greatest differences in N use efficiency between stover management treatments in the reduced tillage …
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Modeling and experimental investigations of drilling carbon fiber reinforced composites
… the delamination. However, updating the chisel edge ratio based on the drill bit geometry results in predicting a more accurate thrust force which can sufficiently minimize the delamination. Finally, the results obtained in this work provide a valuable guideline to better utilize common …
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Tillage effects on properties of Grantsburg soil and growth of corn (Zea mays L.)
… involving three treatments of no-tillage (NT), chisel-plow (CP), and moldboard plow (MP), was conducted in Southern Illinois. The objectives of the study were to: (1) determine effects of tillage on properties of a sloping and eroded Grantsburg soil (fine-silty, mixed, mesic Typic Fragiudalf); …
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Vibration Characterization and Numerical Modeling of a Pneumatic Impact Hammer
… hammer like the center body, handle, piston and chisel as well as the human hand and the ground. Time domain simulations of the hammer were carried out by using a state space formulation to get displacements, velocities and accelerations of the each component as well as the exhaust jet …
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Functional anatomy, osteogenesis and bone microstructure of the appendicular system of African mole-rats (Rodentia: Ctenohystrica: Bathyergidae)
… extensive burrow systems primarily with their chisel-like teeth, but also using their forelimbs for scratch-digging. One of the most exceptional features of bathyergids is their wide spectrum of social organization, which is unique among mammals and ranges from solitary, social and eusocial. …
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Calcite Cementation of Sixty-Five-Year-Old Aragonite Sand Dredge Pile
… very well cemented, which requires a hammer and chisel for sampling. Samples were collected from six sites at various locations of the dredge pile. Samples were analyzed for both chemical and physical properties using thin-section examination, X-ray diffraction, X-ray fluorescence, bulk density …
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Goss’s wilt and leaf blight of corn: chemical control, residue management and resistance
… surface. These tillage methods included no-till, chisel plow and moldboard plow. Ten susceptible hybrids were evaluated for the incidence and severity of Goss’s wilt from natural infection. The incidence (%) and severity (0-9 scale) data were used to calculate a disease severity index (DSI), where …
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Managing Continuous Corn for Yield and Soil Productivity
… removal increased, and equaled that of the chisel plow tillage system when all residue was removed. Across tillage systems in these environments, the response of grain yield to N fertilization was similar when all or half of the residue was removed. Residue removal also reduced the …
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