The Physical Model Study of the Bond Falls Emergency Spillway

Upper Peninsula Power Compan

Adjustable compliance and biarticularity could improve hopping efficiency and robustness

The 11th International Symposium on Adaptive Motion of Animals and Machines. Kobe University, Japan. 2023-06-06/09. Adaptive Motion of Animals and Machines Organizing Committee.Poster Session P7

Physical Model Study of the Fairfax Water Off-Shore Intake: New Modifications and the Study of the Flow Patterns around the Sand Barrier

Fairfax Water, V

Hydraulic Model Study of the Stilling Basin with a Baffled Chute

MWH Americas, Inc

Physical Model Study of the Fairfax Water Off-Shore Intake: New Modifications and the Study of the Flow Patterns around the Sand Barrier

Fairfax Water, V

Testing an Underdrain System under Backwash Flow Conditions for the Chaparral Water Treatment Plant

Johnsons Screens was required to test its underdrain system under backwash flow conditions to assess the uniformity of flow discharge throughout the manifold system. To test the system, a basin was built in St. Anthony Falls Laboratory and the underdrain system components were provided and installed by Johnsons Screens. To assess the uniformity of flow of the manifold system, a measurement technique was developed to determine the flow at a number of locations at design flows. The technique was a flow-capturing apparatus with an open-topped tank, two tubes, a hose and a pump. Using this apparatus, the flow was captured over a period of time and weighed to determine the flow rate from each triplet of orifices. The system error under high system flow rate (about 19 cfs) was less than 0.7%. Six locations were determined by Johnsons Screens for the testing. At each location, a total of five measurements were taken and averaged under the high system flow rate (about 19 cfs) and an additional five measurements for the low system flow rate (about 4.4 cfs). The results of the measurements showed that the deviation of the flow measurements from the mean were within ±5% under high system flows and ±7% under low system flows.Johnsons ScreensEllis, Chris; Christopher, Richard; Mohseni, Omid. (2005). Testing an Underdrain System under Backwash Flow Conditions for the Chaparral Water Treatment Plant. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/169704

Uroflowmetry nomogram in Iranian children aged 7 to 14 years

BACKGROUND: As the voiding habits of Iranian children differs from other children because of some cultural and religious considerations, we aimed to establish normal reference values of urinary flow rates in Iranian children between 7 to 14 years of age. METHODS: Eight hundred and two uroflowmetry studies were performed on children with no history of a renal, urological, psychological or neurological disorder, between the ages 7 and 14. Five hundred twenty five studies from 192 girls and 335 boys were considered in this study excluding the staccato/interrupted voiding pattern or voided volume less than 20 ml. The voiding volume, the maximum and average urinary flow rates were extensively analyzed. RESULTS: The maximal and average urine flow rate nomograms were plotted for both girls and boys. Mean maximum urine flow rate was 19.9 (ml/sec) for boys and 23.5 (ml/sec) for girls with a mean voided volume of 142 (ml) for boys and 147 (ml) for girls. Flow rates showed a close association with voiding volume in both sexes. The maximum and average flow rates were higher in girls than in boys, and they showed a significant increase in flow rates with increasing age, where boys did not. The mean maximum urine flow rates (19.9 ml/sec for boys and 23.5 ml/sec for girls) were found to be higher in this study than other studies. CONCLUSION: Nomograms of maximal and average flow rates of girls and boys are presented in centile form, which can help the physician to evaluate the response to medical or surgical treatment and be useful for the screening of lower urinary tract disturbances in children, for a wide range of voided volumes

The Physical Model Study of the Fish Bypass Louver System of the School Street Hydroelectric Project

Kleinschmidt Associates and Reliant Energ

From template to anchors: transfer of virtual pendulum posture control balance template to adaptive neuromuscular gait model increases walking stability

Biomechanical models with different levels of complexity are of advantage to understand the underlying principles of legged locomotion. Following a minimalistic approach of gradually increasing model complexity based on Template & Anchor concept, in this paper, a spring-loaded inverted pendulumbased walking model is extended by a rigid trunk, hip muscles and reflex control, called nmF (neuromuscular force modulated compliant hip) model. Our control strategy includes leg force feedback to activate hip muscles (originated from the FMCH approach), and a discrete linear quadratic regulator for adapting muscle reflexes. The nmF model demonstrates human-like walking kinematic and dynamic features such as the virtual pendulum (VP) concept, inherited from the FMCH model. Moreover, the robustness against postural perturbations is two times higher in the nmF model compared to the FMCH model and even further increased in the adaptive nmF model. This is due to the intrinsic muscle dynamics and the tuning of the reflex gains. With this, we demonstrate, for the first time, the evolution of mechanical template models (e.g. VP concept) to a more physiological level (nmF model). This shows that the template model can be successfully used to design and control robust locomotor systems with more realistic system behaviours

Assessment and Recommendations for Operation of Standard Sumps as Best Management Practices for Stormwater Treatment (Volume 2)

In order to improve the performance of standard sumps as a best management practice (BMP) in treating stormwater runoff, a baffle was designed to be installed as a retrofit in standard sumps. The retrofit is a porous baffle called "SAFL Baffle". The effect of the SAFL Baffle on the performance of the standard sumps was assessed by conducting laboratory tests on small scale as well as full scale straight flow-through standard sumps equipped with the baffle. In addition, a number of tests were conducted to determine the performance of standard sumps with the SAFL Baffle when the baffle is clogged with debris like trash and vegetation. Furthermore, the performance of two other configurations of the baffle was studied: (1) the SAFL Baffle in a sump with an outlet pipe 90 degrees to the inlet pipe, and (2) the SAFL Baffle in a sump with some water entering the sump through an overhead inlet grate. Standard sumps equipped with the SAFL Baffle were evaluated using two metrics: (1) How well the system captures sediment during low flow conditions (Removal Efficiency Testing), and (2) how well the system retains the previously captured sediment during high flow conditions (Washout Testing). The results of the tests showed that the SAFL Baffle dissipates the energy of water entering the sump and as a result, at low flow rates, it captures sediment better than a standard sump with no baffle. More importantly, at high flow rates, the washout of the previously captured sediment reduces to near zero