1,199 research outputs found
sj-docx-1-cho-10.1177_18632521241232301 – Supplemental material for Outcomes of treatment of patella fractures in children and adolescents
No full textSupplemental material, sj-docx-1-cho-10.1177_18632521241232301 for Outcomes of treatment of patella fractures in children and adolescents by Evan W. Beatty, Mathilde Hupin, Dennis E. Kramer, Benjamin J. Shore and Benton E. Heyworth in Journal of Children’s Orthopaedics</p
Pediatric orthopaedic reconstructive surgery
No full textIncludes bibliographical references and index."Originating from the esteemed Boston Children's Hospital, this new volume in the Illustrated Tips and Tricks series provides succinct, precise information from a wide range of experts on tackling technical problems in pediatric orthopaedic reconstructive surgery. Edited by Drs. Peter M. Waters, Benjamin J. Shore, and Daniel J. Hedequist, this volume presents practical, hands-on content gained from years of surgical experience, including nuggets of wisdom unique to particular institutions. Drawings, operative photos, and videos are used liberally throughout the book to illustrate surgical techniques and provide a handy visual complement to the text. Covers all areas of pediatric orthopaedic reconstructive surgery including sports medicine surgery, reconstruction, neuromuscular correction, upper extremity surgery, spine surgery, hip surgery, pediatric foot and ankle surgery, cerebral palsy related surgery, and orthopaedic oncology.Features the latest surgical techniques, presented in a crisp, step-by-step style, and provides brief overviews of equipment, anesthesia, patient positioning, and other procedural elements.Designed for residents, fellows, and practicing orthopaedists-those in training or anyone who needs to brush up on the latest techniques.Numerous illustrations offer visual guidance for clinical procedures and patient interaction.Concise, bulleted format makes for easy reading and quick absorption of material.eBook features procedural videos and additional clinical guidance. Enrich Your eBook Reading Experience Read directly on your preferred device(s), such as computer, tablet, or smartphone.Easily convert to audiobook, powering your content with natural language text-to-speech. "--1 online resourc
sj-docx-1-cho-10.1177_18632521221121846 – Supplemental material for Unilateral versus bilateral reconstructive hip surgery in children with cerebral palsy: A survey of pediatric orthopedic surgery practice and decision-making
No full textSupplemental material, sj-docx-1-cho-10.1177_18632521221121846 for Unilateral versus bilateral reconstructive hip surgery in children with cerebral palsy: A survey of pediatric orthopedic surgery practice and decision-making by Stacey D Miller, Maria Juricic, Njalalle Baraza, Nandy Fajardo, Judy So, Emily K Schaeffer, Benjamin J Shore, Unni Narayanan and Kishore Mulpuri in Journal of Children’s Orthopaedics</p
sj-docx-2-cho-10.1177_18632521221121846 – Supplemental material for Unilateral versus bilateral reconstructive hip surgery in children with cerebral palsy: A survey of pediatric orthopedic surgery practice and decision-making
No full textSupplemental material, sj-docx-2-cho-10.1177_18632521221121846 for Unilateral versus bilateral reconstructive hip surgery in children with cerebral palsy: A survey of pediatric orthopedic surgery practice and decision-making by Stacey D Miller, Maria Juricic, Njalalle Baraza, Nandy Fajardo, Judy So, Emily K Schaeffer, Benjamin J Shore, Unni Narayanan and Kishore Mulpuri in Journal of Children’s Orthopaedics</p
Infestation of shore crab gills by a free-living mussel species
No full textParasitic and commensal species can impact the structure and function of ecological communities and are typically highly specialized to overcome host defences. Here, we report multiple instances of a normally free-living species, the blue mussel Mytilus edulis Linnaeus, 1758, inhabiting the branchial chamber of the shore crab Carcinus maenas (Linnaeus, 1758) collected from widely separated geographical locations. A total of 127 C. maenas were examined from four locations in the English Channel, one location in the Irish Sea and two locations at the entrance of the Baltic Sea. The branchial chambers of three crabs (one from the English Channel and two from Gullmar Fjord, Sweden) were infested with mussels resembling the genus Mytilus. Sequencing at the Me15/16 locus on the polyphenolic adhesive protein gene confirmed the identity as M. edulis. Bivalve infestation always occurred in larger red male individuals. Up to 16 mussels, ranging from 2 to 11 mm in shell length, were found in each individual, either wedged between gill lamellae or attached to the branchial chamber inner wall. This is one of the first reports of a bivalve inhabiting crustacean gills and is an intriguing case of a normally free-living prey species infesting its predato
Interactive effects of losing key grazers and ecosystem engineers vary with environmental context
No full textLoss of biodiversity may cause significant changes to ecosystem structure and functioning. Evidence from long-term in situ removal experiments is rare but important in determining the effects of biodiversity loss against a background of environmental variation. Limpets and mussels are thought to be important in controlling community structure on wave-exposed shores in the UK: limpets as key grazers, mussels as ecosystem engineers. A long-term factorial removal experiment revealed interactive effects that varied between 2 shores in SW England. At one site (Harlyn), removing limpets caused a significant shift in community structure, but where limpets were lost, the presence or absence of mussels made little difference. Where limpets were present, however, the removal of mussels changed the structure and variability of the community. At the other site (Polzeath), the loss of mussels caused significant changes in community structure, and limpets played a less important role. At Harlyn, fucoid algae were abundant throughout the year. There were fewer algae at Polzeath, and cover was dominated by the summer bloom of ephemerals. At Harlyn, the limpets played a major role in controlling algae, but their effects were mediated by the presence of mussels. Other grazers were not able to fulfil their role. At Polzeath, mussels were far more important, and ephemeral algae grew on them regardless of the presence or loss of limpets. These findings emphasise the need to assess spatial and temporal variation in the effects of biodiversity loss and the importance of interactive effects of loss of multiple species from different functional groups
Cross-shore sediment transports on a cut profile
No full textPeople always want to live near water and all over the world the areas near the sea get more and more built with houses, hotels and infrastructure. For this reason there is a trend to reclaim land by making an artificial island near or against the existing coast. Examples are the airport 'Chek Lap Kok' in Hong Kong and the 'Plan Waterman', a plan to extend the Dutch coastline between Hook of Holland and Scheveningen, also known as the 'Plan New Holland'. Mostly this extension is made by dredging material from relatively deep water near the coast and dumping the material in the nearshore section. The safest way is to shift the existing cross-shore profile over the distance of the land reclamation. This way there will not be very large changes in cross shore sediment transports, because the beach profile keeps the same shape. However, to make a land reclamation this way, a lot of material has to be dredged, which makes the land reclamation expensive. There is also another way to make the land reclamation. On a certain level beneath mean sea level a cut-off can be applied. This means, that the cross-shore profile will not be shifted completely over a certain distance. In the near shore area the design profile will have the same shape as the existing beach profile. Then, from a certain level beneath mean sea level, the design profile will have a constant and relatively steep slope until it reaches the existing beach profile. By doing this, a lot of material is saved when making the land reclamation. During this study the "Plan Waterman" is used for computations with the numerical model UNIBEST-TC, developed by DELFT HYDRAULICS. The model has been calibrated by using a beach profile at Ter Heijde and wave measurements from the EURO-O-platform. From initial computations on several cut profiles it is concluded, that it should be avoided to let waves break due to the cut-off. Because this sudden breaking of waves large seaward directed sediment transports occur which result in fast bed changes. A less steep slope of the cut-off can reduce the sudden breaking of waves. For several cut profiles morphological computations have been made over a period of 10 years and from a comparison of the volumes in the model it is concluded, that the cut-off should be placed at at least NAP -14 m, when a profile development is wanted, which comes close to the development of a land reclamation without a cutoff being applied. However, when looking from an economical point of view, a cut-off at small depth is still a good alternative. By applying a cut-off at small depth, a lot of material and thus money will be saved. The interest money of this saved money is much more than the costs of frequent nourishments necessary for maintaining the beach profile. Up to f4.000,-- per meter of coastline can be saved each year when applying a cut-off at NAP -6 m. However, a cut-off at NAP -6 m will give a decline of the waterline.Hydraulic EngineeringCivil Engineering and Geoscience
sj-docx-1-cho-10.1177_18632521221137391 – Supplemental material for Distal femoral extension osteotomy and patellar tendon advancement or shortening in ambulatory children with cerebral palsy: A modified Delphi consensus study and literature review
No full textSupplemental material, sj-docx-1-cho-10.1177_18632521221137391 for Distal femoral extension osteotomy and patellar tendon advancement or shortening in ambulatory children with cerebral palsy: A modified Delphi consensus study and literature review by Erich Rutz, Tom F Novacheck, Thomas Dreher, Jon R Davids, James McCarthy, Robert M Kay, Benjamin J Shore, M Wade Shrader, Matthew Veerkamp, Hank Chambers, Unni Narayanan, Kristan Pierz, Jason Rhodes, Jeffrey Shilt, Tim Theologis, Anja Van Campenhout and Kerr Graham in Journal of Children's Orthopaedics</p
Modelling the impact of an offshore breakwater on the shore
No full textThis report is the result of a master thesis of the author, student at Delft University of Technology, faculty of Civil Engineering. The study was carried out at DELFT HYDRAULICS. In this report the effects of an offshore breakwater on the shore are investigated with the morphodynamic models DELFT2D-MOR and DELFT3D. These, respectively 2-dimensional horizontal and quasi 3-dimensional models, were developed by DELFT HYDRAULICS. The offshore breakwater lay-out simulated in this study serves as a test case for these two models. The breakwater lay-out simulated in this study is subjected to the action of both normal and oblique incident waves. In the former case no current is present since the computations are executed in the absence of tide. In the case of oblique waves a wave-driven longshore current is present. Within the 2-dimensional model the cross-current transport mechanisms are neglected which result in unrealistic bottom profile evolutions. However, bearing this in mind the results are still very useful for getting insight into the littoral processes. A comparison of the model results with laboratory and field data shows that the model is able to simulate the dominant morphodynamic features induced by the offshore breakwater. In the case of normal incident waves, sediment is trapped into the lee of the breakwater from both lateral sides forming a tombolo in the equilibrium state. In the case of oblique incident waves also a tombolo is created while heavy erosion occurs at the down-stream side. However, after tombolo forming accretion occurs at the up-stream shore which finally results in bypassing and filling of the down-stream scour hole. Before simulating the offshore breakwater lay-out with the quasi 3-dimensional model a number of errors had to be detected and removed from the numerical model. Furthermore, two improvements had to be made. First, it was noticed that the dissipation had to be incorporated into the 'continuity corrections' in order to reduce the number of calls of the wave and flow module. This reduces the required computational time considerably. Second, a better estimation of the bed-level celerity was made in order to guarantee numerical stability. Next the breakwater lay-out was applied to the Q3D model. In these computations the sediment transport by the secondary current and the resulting bottom profile evolution is clearly visible. Furthermore, the resulting bathymetry has less steep slopes due to the crosscurrent transport mechanisms. However, the resulting bathymetry contains very irregular bottom contour lines. So locally high transport rates occur which result in a decrease of the computational time step and, consequently, an increase of the required computational time. It is shown that accounting for the flow velocities in the wave computation (wave-current interaction) improves these results considerably. The resulting bathymetry contains less irregular contour lines.Hydraulic EngineeringCivil Engineering and Geoscience
Cross-shore stratified tidal flow seaward of a mega-nourishment
No full textThe Sand Engine is a 21.5 million m3 experimental mega-nourishment project that was built in 2011 along the Dutch coast. This intervention created a discontinuity in the previous straight sandy coastline, altering the local hydrodynamics in a region that is influenced by the buoyant plume generated by the Rhine River. This work investigates the response of the cross-shore stratified tidal flow to the coastal protrusion created by the Sand Engine emplacement by using a 13 h velocity and density survey. Observations document the development of strong baroclinic-induced cross-shore exchange currents dictated by the intrusion of the river plume fronts as well as the classic tidal straining which are found to extend further into the nearshore (from 12 to 6m depth), otherwise believed to be a mixed zone. Estimates of the centrifugal acceleration directly after construction of the Sand Engine showed that the curvature effects were approximately 2 times stronger, suggesting that the Sand Engine might have played a role in controlling the cross-shore exchange currents during the first three years after the completion of the nourishment. Presently, the curvature effects are minute.Coastal EngineeringEnvironmental Fluid Mechanic
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