Experimental mechanics study of a dam Tainter gate

Abstract only availableThe primary objective of this instrumentation project is to determine the performance of the Tainter gate's trunnion bearings at the Carlyle Lake Dam in Illinois. The Tainter gate is a type of radial arm floodgate used in dams and canal locks to control water flow. The trunnion bearings are the critical component of the structure. Friction in the bearing can cause excessive forces in the structural arms of the Tainter gate and can result in a structural failure of the gate Experimental determination of the stresses in the structural arms facilitates computation of friction encountered in the trunnion bearing when raising or lowering the gate. Specially designed transducers which could be readily attached to the structural arm were fabricated and installed to measure the strains present in the gate during routine operation. The transducer consisted of four strain gauges mounted on the flexural transducer and wired in a Wheatstone bridge configuration. The change in resistance of the Wheatstone bridge is linearly related to the strain imposed on the transducer. By measuring the voltage history of the transducer it is possible to determine strain in the structural arms during operations of the Tainter gate. The strains were recorded by using a LabView program custom written for this purpose. Simple mechanics based analysis of the resulting strains is expected to facilitate analysis of forces on the bearing. Preliminary results from the field investigation will be presented and discussed.US Army Corps of Engineers Engineer Research and Development Center, College of Engineering Undergraduate Research Optio

Iron Acquisition in \u3cem\u3eRhodococcus erythrolpolis\u3c/em\u3e: the Isolation of Mutant(s) that Do Not Produce a Siderophore.

Rhodococcus, a soil bacterium, displays a diverse range of metabolic capabilities with a number of potential practical applications. To exploit the metabolic potential of Rhodococcus, their basic physiology, genetics, and especially the acquisition of essential nutrients like iron, must be understood. R. erythropolis strain IGTS8 releases a small compound called a siderophore, that scavenges ferric iron from the environment. To learn more about the genetic control of iron acquisition, mutant(s) defective in siderophore production were isolated. Mutants were generated, by inserting a mutagenic plasmid, pJCS506, into the bacterial cell using electroporation. The plasmid, which cannot replicate in these bacterial cells, randomly inserts into the R. erythropolis genome producing mutations. The potential mutants were detected by screening on a chrome azurol S plate, which detects siderophore production. Colonies that failed to produce siderophore were tested by liquid assays. The strain N5-59 was confirmed as a non-siderophore producing mutant by liquid assays

Endometriosis: clinical and pathological review of 279 personal cases

Thesis (M.A.)--Boston University, 195

New-normal market entry mode for pharmaceuticals: an Internet of Things (IoT) market entry framework stemming from COVID-19

Purpose: To determine new-normal uncertainty considerations stemming from the covid-19 pandemic to consider within transaction-cost analysis for pharmaceuticals. To propose new-normal market entry strategies to address the uncertainty as a result of covid-19’s implications and provide for lack of knowledge and information in an uncertain business environment by way of Internet of Things (IoT) ecosystem for pharmaceutical market entry. Methodology: In this paper, we focus on the uncertainty facet within transaction-cost analysis consideration and utilise a descriptive three-case study approach taking in Johnson and Johnson (J&J), GlaxoSmithKline (GSK) and Novartis to present an ADO (Antecedent-Decisions-Outcomes) understanding of their usual market entry approach, the approach undertaken during the pandemic and the outcomes thereafter facilitating new-normal uncertainty considerations to factor in. Further with this insight, we develop a conceptual framework addressing the transaction-cost analysis implications of uncertainties toward lack of knowledge and information for new-normal market entry approach and operating strategy for pharmaceuticals applicable due to IoT (Internet of Things). Findings: Uncertainty (external and internal) is different now in the new-normal business environment for pharmaceuticals and boils down to acute shortage of knowledge and information impact to make an appropriately informed decision. Therefore, considering the changed factors to consider, pharmaceuticals need to be able to undertake market entry with vaccines and medicines by way of IoT thereby enabling, the filling of the gap via real-time data access and sharing including enhancing predictive analysis for sustenance. Originality: It is the first study to our knowledge that throws light on transaction-cost analysis theory’s uncertainty facet for pharmaceuticals. It is also the first study that provides new-normal market entry strategy for pharmaceutical companies built on interoperability of real-time IoT

Analysis Of Immunological Responses Of Murine Macrophages To Hydroxyapatite [RD755.6. V441 2006 f rb].

Tujuan kajian ini adalah untuk menganalisis tindak balas immunologi hidroksiapatit (HA) ke atas sel RAW264.7 dengan menentukan fagositosis terangsang HA. The aim of the present study was to analyze the immunological response of hydroxyapatite (HA) to RAW264.7 cells by determining HA-induced phagocytosis

A rare case of hypertrophic lichen planus caused by ingestion of ink

Lichen planus is a papulosquamous disorder that affects the skin as well as mucous membrane. It is classified into different variants according to the location and morphology. Hypertrophic lichen planus is one of the clinical variants. Here we have described a case of four-year-old boy with unusual presentation of hypertrophic lichen planus caused by chewing refill of ballpoint pen.                                                                                                                                                                                                                                            

Labour and health in colonial Nigeria

We examine the determinants of time allocation and child labour in a year-long panel of time-use data from colonial Nigeria. Using quantitative and ethnographic approaches, we show that health shocks imposed time costs on individuals. Whether individuals could recruit substitutes depended on social standing, urgency of work, and type of illness. Child labour did not systematically respond to temporary parental illness, but could replace a permanently disabled adult. Child labour was coordinated with parental work, aided childcare, and allowed children to build skills and resources. These decisions can be understood within an endogenous bargaining power framework with labour complementarities

Collisional losses, decoherence, and frequency shifts in optical lattice clocks with bosons

We have quantified collisional losses, decoherence and the collision shift in a one-dimensional optical lattice clock with bosonic 88Sr. The lattice clock is referenced to the highly forbidden transition 1S0 - 3P0 at 698 nm, which becomes weakly allowed due to state mixing in a homogeneous magnetic field. We were able to quantify three decoherence coefficients, which are due to dephasing collisions, inelastic collisions between atoms in the upper and lower clock state, and atoms in the upper clock state only. Based on the measured coefficients, we determine the operation parameters at which a 1D-lattice clock with 88Sr shows no degradation due to collisions on the relative accuracy level of 10-16.Comment: 4 pages, 3 figure

Stressful eating indulgence by Generation Z: a cognitive conceptual framework of new age consumers’ obesity

Purpose: To delineate the phenomenon of stressful eating within generation Z due to the times they are living in. To extract propositions which elucidate phases of stressful eating within Zers. Methodology: Based on relevant literature on consumer obesity, theories of pure impulse buying and reasoned action, cognitive constructs eminent for reasoned conditioned behaviour is extracted. Followed by extraction of the reasoned conditioned behaviour and its cognitive constructs within Zers. Thereafter a conceptual framework is developed with propositions of stressful eating within Zers. Findings: Zers indulge in reasoned conditioned behaviour initially owing to their healthy understanding insights, and the activations of cognitive capacities within them due to the law of effect. The law of effect is cyclical after the first reasoned consumption among Zers, leading to obesity and constricting self-controlling behaviour. Originality Value: It is the first study that provides a deep understanding of the cognitive mechanism orienting generation Z’s stressful eating indulgence even though they have higher healthy lifestyle understandings