An Investigation of Five Methods of Inter-Class Grouping in the Elementary School

The purpose of this paper will be to research five (5) methods of elementary school inter-class grouping,which can make available a climate for learning. These five methods are: 1. Graded Elementary School 2. Dual-Progress Plan 3. Departmentalization 4. Non-graded Organization 5. Team Teachin

Decay tagging of neutron-deficient 73,74Sr

The isospin dependence of the nuclear interaction was probed using energy differences between analogue excited states across the A=74 isobaric triplet. The first spectroscopy of transitions between states in the proton-dripline nuclide, 74Sr was performed using the highly-selective recoil-beta tagging technique with the JUROGAM II + RITU + GREAT setup at the University of Jyvaskyla. Considerable experimental development was required to acheive the requisite level of sensitivity. This included the development of a phosphor-sandwich detector, a finely segmented doublesided silicon-strip detector (DSSD) and a charged-particle veto array (UoYtube). The 2+ to 0+ and 4+ to 2+ transitions were identified through a combination of time and energy gates, and the implementation of a charged-particle veto. A beta-decay half-life was also extracted, in good agreement with a complementary measurement performed at RIKEN. Comparison with Skyrme Hartree-Fock calculations indicates that 74Sr is approximately 1-MeV less bound than previously supposed, implying that both observed excited states are two-proton unbound. Through comparison with published data from the A=74 isobar, triplet-energy differences (TEDs) were determined, indicating a continued need for an additional isotensor, J=0, 100-keV isospin-nonconserving (INC) interaction component, consistent with that found to be required at lower masses. The implication of this result is that such an INC component is mandated across the nuclear landscape, regardless of local nuclear structure effects. Additionally, candidates for the beta-delayed proton decay of 73Sr via 73Rb to 72Kr were observed using the same experimental setup. The lowest energy proton detected is consistent with that which might be expected for the decay of the ground state in 73Rb, allowing for the first measurement of the proton separation energy, Sp. This value is of considerable astrophysical interest since 73Rb is considered to be a waiting point in the rp process

A4_2 How Many Lies Could Pinocchio Tell?

The 1940 animated lm `Pinocchio' tells the story of a puppet who, having been brought magically to life, finds that his nose grows whenever he tells a lie. In this paper, we attempt to determine the effect that this growth might have on Pinocchio's balance. By comparing Pinocchio's apparent size to that of his creator, Geppetto, we estimate his approximate dimensions. We then examine the rate of growth of his nose as shown in the film and calculate the displacement of his centre of mass from its original position after each successive lie he tells. Based on this, we then determine that the maximum number of lies Pinocchio can tell without compromising his balance is five

A4_8 How To Float

In this paper, we resolve the vertical forces acting on a 70 kg person to determine that if their lungs are entirely full of helium gas they would feel between 5.24 - 8.73 grams lighter; this is assuming that their surroundings are at a temperature of 20 ◦C and at a pressure of 1 atm. Taking the density of a human body to be 1010 kgm−3 [1], we also calculate that in order to be lifted upwards in air, they must inhale a volume of 129 m3 of helium gas. Finally, we discuss the feasibility of inhaling helium gas as a means to achieve the ability to reach suspension in air.

Smart Visual Beacons with Asynchronous Optical Communications using Event Cameras

Event cameras are bio-inspired dynamic vision sensors that respond to changes in image intensity with a high temporal resolution, high dynamic range and low latency. These sensor characteristics are ideally suited to enable visual target tracking in concert with a broadcast visual communication channel for smart visual beacons with applications in distributed robotics. Visual beacons can be constructed by high-frequency modulation of Light Emitting Diodes (LEDs) such as vehicle headlights, Internet of Things (IoT) LEDs, smart building lights, etc., that are already present in many real-world scenarios. The high temporal resolution characteristic of the event cameras allows them to capture visual signals at far higher data rates compared to classical frame-based cameras. In this paper, we propose a novel smart visual beacon architecture with both LED modulation and event camera demodulation algorithms. We quantitatively evaluate the relationship between LED transmission rate, communication distance and the message transmission accuracy for the smart visual beacon communication system that we prototyped. The proposed method achieves up to 4 kbps in an indoor environment and lossless transmission over a distance of 100 meters, at a transmission rate of 500 bps, in full sunlight, demonstrating the potential of the technology in an outdoor environment.Comment: 7 pages, 8 figures, accepted by IEEE International Conference on Intelligent Robots and Systems (IROS) 202

A4_7 Would The Odyssey Fly?

The feasibility of the Odyssey being used as a hot air balloon is assessed. The buoyancy force required to lift the Odyssey off the ground is calculated to be 7.051 ×10^6 N , meaning the density of the heated air inside the balloon would need to be -14.97 kgm −3 . This means the Odyssey would not be able to fly, if it were acting as a hot air balloon

A4_1 How Hungry Was The Very Hungry Caterpillar?

The very hungry caterpillar follows the story of a caterpillar on its journey from hatching to becoming a butterfly. Over the course of a week the caterpillar eats through a variety of foods, by approximating the caterpillar as a sphere the final mass of the caterpillar was calculated to be 1849g with a radius of 68.3mm.By extrapolating data of the mass of butterflies versus their wing length, the wing length of the butterfly created by the caterpillar was calculated to be 55m, approximately the same size as a Boeing 747 [6]

A4_3 The Great Flood

The Great Flood is a biblical event, said to have occured to cleanse the Earth. The magnitude of this flood and the disasterous affect it would have are explored and it is found 3.875 × 10 18 m 3 of water is needed to fill the Earth to the height of Mount Everest. It is found the temperature of the Earth would increase greatly due to the lower albedo of the planet and the increase in greenhouse gases