152,202 research outputs found
Postcard of Model Canal Boat St. Helena
No full textOne color photographic postcard of a model of the Canal Boat St. Helena by the Stark County Historical Society, Canton, Ohio. Text on back of postcard says ""This extremely accurate scale model was made by W.J. McLaughlin, a canal man and from a canal family who worked on the Ohio and Erie Canal. Work began on the Canal in 1825 and 7 years later the entire system with the exceiption of the lift lock into the Ohio River was finished. Thus the means of opening up Ohio was completed and a period of astounding grown ensued."" The back of the postcard also says it was published by Kelley's Stuidio, 202 N. Potomac St., Hagerstown, Md. and that the color was done by Frank D. Kelley
Miami and Erie Canal through Dayton plat map
No full textCanal plat map showing a section of the Miami and Erie Canal through Dayton in Montgomery County, between stations 18 and 43. Roads, properties, railways and other landmarks along the route are noted, along with a chart titled "Distances in feet from top water line of Canal to inner rail of C. H. & D. [Cincinnati, Hamilton & Dayton] track." The map was created under the direction of the members of the Canal Commission of the state of Ohio and approved by the Chief Engineer of the Department of Public Works (variously referred to as the Board of Public Works and the Division of Public Works).
Construction on the Miami and Erie Canal took place between 1825 and 1845, and the finished route connected Cincinnati and Toledo, as well as the Ohio River with Lake Erie
Mathematical Modelling of flow in Schlemm's canal and its influence on primary open angle glaucoma
No full textPOAG (Primary Open Angle Glaucoma) is a major cause of blindness. This normally occurs when the IOP (intraocular pressure) increases. High pressure can be caused by an imbalance in the production and drainage of fluid (aqueous humour, AH) in the eye. AH is continually being produced but sometimes cannot be drained because of improperly functioning drainage channels (trabecular meshwork, TM). A mathematical model is presented for the flow of AH through the TM and into the SC (canal of Schlemm) and to couple this flow in order to predict changes in IOP. The governing equations have been developed by using the lubrication theory limit of the Navier-Stokes equations. To close the model, Friedenwald’s law has been used to predict changes of IOP. Several different cases have been examined in the model, relating AH flow to changes in IOP for various submodels: (i) the permeability, k in Darcy’s law may be either constant or not constant; (ii) the TM may be deformable so that the general theory of a beam under axial load is applicable - a number of different subcases where either ? or ?, may be either large or small have been considered. However only the subcase ? is small has been discussed in this study by assuming the permeability, k is constant and the TM is deformable. This subcase has been solved by using the regular perturbation method. The results show that the IOP rises continually when ? is small and may cause blindness
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Water quality modeling for the Kennet and Avon Canal, a navigational canal in an inland catchment
No full textThe Kennet and Avon Canal in southern England is experiencing severe water quality problems caused by inorganic sediment and algae. These water quality problems are affecting the angling sport of fishermen downstream of the confluence of the canal with the River Kennet. The Environment Agency has been called upon to remedy these issues, but before proceeding they desire a computer model capable of predicting the water quality impacts of various scenarios under consideration. No such model was available to them.
This project identified the key solids generation and transport processes to be included in a water quality model for inland navigational canals. Where available, equations from the literature describing relevant processes were used or modified for inclusion in a canal modeling algorithm. Where literature was not available, water quality samples were taken to characterize needed relationships. The final algorithm was coded and tested using a simplified dataset that allowed clear evaluation of the simulated processes.
After successful testing, the canal model was applied to the Kennet and Avon Canal. The time series predicted by the model were compared to observed hydrological, solids, and chlorophyll-a (representing algae) data at multiple points in the canal. The model adequately predicted all of these constituents at the monitored locations.
The final task in the project required evaluation of six management scenarios proposed by the Environment Agency to address the water quality problem. The model suggests that filtration or other treatment of water in the canal near the confluence with the river is the best management option, as it will address both the elevated inorganic sediment and algae concentrations at the most critical point in the canal. Less desirable options include efforts that only target inorganic sediment, which could increase algal concentrations by increasing light availability; and diversion of surface flows from the canal, which could possibly damage the hydrologic balance of the canal while encouraging undesirable algal growth
Panama Canal Rainfall (D to J)
No full textRaw precipitation data from the Panama Canal
Authority.This is a compressed files with individual station precipitation data. There are four files in this series.This file contains data for station names starting with 'D' to 'J' Data have been freely provided by the Panama Canal Authority
and are in the public domain.Any publication using these data should credit the Panama Canal Authority.Some data has been curated by STRI's Physical Monitoring Program.All data are provided on an 'as is' basis.</p
Evaluation on the anatomic variations of the mandibular canal using cone beam computed tomography and panoramic radiography
No full textTCC (graduação) - Universidade Federal de Santa Catarina. Centro de Ciências da Saúde. Odontologia.Some procedures in dentistry, as anesthesia, dental implants placement and third molars extraction may vary the degree of difficulty and surgical complications, due to specific and individual anatomy of each patient. Detecting these variations is considerably relevant to the dentist, who is able to avoid and/or prevent intraoperative or postoperative complications. Focusing on the challenges in the mandible, this study aimed to assess the prevalence of anatomical variations of the mandibular canal, determining the most frequent, and comparing the results with those found in previous studies. 60 human cadavers’ jaws were submitted to radiographic and tomographic examinations, which were analyzed by a single calibrated observer. In the panoramic radiographs analysis the forward canal was the most common, registering 8,3%, while in the analysis of CT scans, the retromolar canal proved that it is more frequent, 35%. Cone-beam computed tomography proved to be more effective in the diagnosis of anatomical variations of mandibular canal and must be requested whenever exists suspicions of bifid mandibular canal in panoramic radiography.Alguns procedimentos na odontologia, como anestesias, instalação de implantes dentários e extrações de terceiros molares podem variar quanto ao grau de dificuldade e complicações cirúrgicas, devido à anatomia específica e individual de cada paciente. Detectar essas variações é de considerável relevância para o cirurgião dentista, sendo esse, capaz de evitar e/ou prevenir complicações transoperatórias ou pós-operatórias. Com enfoque nas alterações presentes na mandíbula, este estudo teve como objetivos avaliar a prevalência das variações anatômicas do canal mandibular, assim como comparar os resultados obtidos na análise de tomografias computadorizadas de feixe cônico, com os encontrados na análise de radiografias panorâmicas. Para tal, 60 mandíbulas de cadáveres humanos foram submetidas a exames radiográfico e tomográfico, os quais foram analisados por um único observador calibrado. Na análise das radiografias panorâmicas o canal duplicado em braço foi o mais comum, 8,3%, enquanto na análise das tomografias, o canal retromolar mostrou-se muito mais frequente, 35%. A tomografia computadorizada de feixe cônico mostrou-se muito mais eficaz no diagnóstico de variações anatômicas do canal mandibular e deve ser solicitada sempre que houver suspeita de duplicação do canal na radiografia panorâmica
Lock 4 Plaque
No full textOne color photographic print of a commemorative plaque for Lock 4 on the Ohio and Erie Canal in Canal Fulton in Stark County, Ohio. The plaque reads: ""Canal Fulton. Lock No. 4. Lock No. 4 is the fourth lock south of Summit Lake on the Ohio and Erie Canal. The lock was originally built in 1827 of stone to a width of 16 feet and a length of 90 feet. The lock was in active use from 1827 to 1913. The lock was first restored in 1908 with concrete used in place of the original stone construction. Funded by: The U.S. Department of Housing and Urban Development. Lock No. 4 Restoration June, 1981. Stark County Board of Commissioners. Norman W. Sponseller. Gerald J. Patrick. Richard D. Watkins and the Canal Fulton Heritage Society. Maintained by Stark County."
Lock 4 Plaque
No full textOne color photographic print of a commemorative plaque for Lock 4 on the Ohio and Erie Canal in Canal Fulton in Stark County, Ohio. The plaque reads: ""Canal Fulton. Lock No. 4. Lock No. 4 is the fourth lock south of Summit Lake on the Ohio and Erie Canal. The lock was originally built in 1827 of stone to a width of 16 feet and a length of 90 feet. The lock was in active use from 1827 to 1913. The lock was first restored in 1908 with concrete used in place of the original stone construction. Funded by: The U.S. Department of Housing and Urban Development. Lock No. 4 Restoration June, 1981. Stark County Board of Commissioners. Norman W. Sponseller. Gerald J. Patrick. Richard D. Watkins. And the Canal Fulton Heritage Society. Maintained by Stark County."
Hydraulic simulations to evaluate and predict design and operation of the Chashma Right Bank Canal
No full textIrrigation systems / Irrigation canals / Flow control / Velocity / Canal regulation techniques / Hydraulics / Simulation models / Design / Operations / Crop-based irrigation / Distributary canals / Water delivery / Policy / Protective irrigation / Water allocation / Water requirements / Sedimentation / Water distribution / Equity / Water conveyance / Pakistan / Chashma Right Bank Canal
EFFECTS OF INCREASING PANAMA CANAL TOLL RATES ON U.S. GRAIN EXPORTS
No full textSome believe Panama Canal toll rates will increase dramatically as Panama's sovereignty over the Canal becomes complete at the end of this century. This paper focuses on the ability of Panama Canal management to extract additional toll revenues from United States grain traversing the Canal and the impact of increased toll rates on export grain flows. Analyses show toll rates established by a revenue-maximizing Canal management would exceed historical and current rates. A monopolizing Canal operator would have moderately increased Pacific port exports in the mid-1970Â’s; whereas, in the 1979-82 period, Pacific port flows would have exceeded historical levels.International Relations/Trade,
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