Stair Climbing Hand Truck

Abstract Getting a heavy object up a flight of stairs usually requires a team of two or more people. Even with a team of people, the task is often still difficult, dangerous, and possibly insurmountable by one person. This problem is especially prevalent in for those who are moving into apartment complexes. Most apartment complexes have many buildings with two or more floors of living quarters, and elevators are often missing. This project sought to offer a solution to this problem. The solution in question; a motorized hand-truck with 2, trigonal planar pinwheels in place of the stock wheels. The stock wheels were removed. Pillow block bearings were put in their place. These pillow block bearings are the mount for an axle shared by the two trigonal planar pinwheels. Power from a modified winch is supplied to the shared axle by way of chain drive. The two trigonal planar pinwheels also have two “foot wheels” on either side of the end of each respective arm. The “foot wheels” are such that the hand-truck can be rolled around as a normal hand-truck while on flat ground. This project was predicted to be capable of carrying heavy loads of 60-150 lbs. In testing, the final product was shown to be capable of carrying 160 lbs

Impact of Homework on Learning

Homework is a common feature in many middle and high school classrooms around the world, but it is not always utilized effectively. In some instances, homework is assigned with little consideration for its effectiveness and the impact it has on students. Extensive research has been conducted on the topic of homework and its impact on learning and on students. This research indicates that homework can sometimes provide benefit to the student when designed appropriately, but its benefit has a limited impact. This project explores the various reasons that teachers have for assigning homework, such as practice, communication, or as a matter of policy. It also examines how homework can be effectively designed to achieve a real learning objective. Finally, it reflects on the potential consequences homework has on students, such as stress and loss of time for other important activities. A workbook and professional development series were designed to communicate these ideas to teachers and administrators while also engaging them in a critical discussion about homework. The project seeks to generate conversations about homework that challenge preconceived ideas about its necessity or benefit. The goal is to equip educators with the knowledge to make informed choices when determining how to use homework in their classrooms, and to consider alternative approaches. Ultimately, teachers should be making conscious choices about all aspects of teaching and learning for the benefit of the whole student

Traditions And Transformations:Five Years Of Civil War Books

Interview with Dr. James McPherson by Christopher S. Freeman James McPherson was born in North Dakota, grew up in Minnesota, graduated from Gustavus Adolphus College in that state in 1958, Ph.D. from Johns Hopkins University in 1963. He has taught since 1962 at Princet...

A comparison between single sided friction stir welded and submerged arc welded DH36 steel thin plate

The adoption of the friction stir welding (FSW) process into the shipbuilding industry is being considered as a medium term issue. Currently the data on friction stir welded mild steels tends to be fragmented, with critical areas being short on specific data e.g. toughness. The work described has been put in place to directly compare friction stir welded and submerged arc welded thin plate. The plate thicknesses used were 4, 6 and 8mm thick DH36 grade steel, which are commonly used in the construction of vessels such and destroyers, frigates corvettes and offshore patrol vessels. Friction stir welding was carried out using the currently best established parameters for a single sided process and this was compared against Submerged Arc Welding (SAW) over the same thickness range. Distortion was found to be lower in friction stir welded steel, but the 4mm thick was still showing significant distortion. No issues were identified with weld metal strength, and toughness at -20OC was found to be comparable but more uniform across the weld area than with the submerged arc welded material. Microstructural observations have been linked to hardness, toughness and fatigue test data. The fatigue data includes the observation of preferential crack initiation relative to the trailing/leading side of the welding process. An assessment on the feasibility of the process in a shipbuilding environment will be included based on the data presented

Trends of employee training in post-war industry

Thesis (M.B.A.)--Boston University, 1945. This item was digitized by the Internet Archive

The concept of professionalism in the insurance industry.

Thesis (M.A.)--Boston Universit

Thermal analysis of the southern Powder River Basin, Wyoming

Journal ArticleTemperature and geologic data from over 3000 oil and gas wells within a 180 km x 30 km area that transect across the southern Powder River Basin in Wyoming, U.S.A., were used to determine the present thermal regime of the basin. Three-dimensional temperature fields within the transect, based on corrected bottom-hole temperatures (BHTs) and other geologic information, were assessed using: (1) A laterally constant temperature gradient model in conjunction with an L1 norm inversion method, and (2) a laterally variable temperature gradient model in conjunction with a stochastic inversion technique. The mean geothermal gradient in the transect is 29°C/km, but important lateral variations in the geothermal gradient exist. The average heat flow for the southern Powder River Basin is 52 mW/m 2 with systematic variations between 40 mW/m 2 and 60 mW/m2 along the transect. Extremely high local heat flow (values up to 225 mW/m2) in the vicinity of the Teapot Dome and the Salt Creek Anticline and low heat flow of 25 mW/m 2 occurring locally near the northeast end of the transect are likely caused by groundwater movement

The Biology and Management of Phytophagous Stink Bugs (Pentatomidae) in Mississippi Soybean Production Systems

Stink bugs are the most economically important insect pest of soybeans in Mississippi. This study focused on several aspects of stink bug biology and management. One study examined the residual activity of certain insecticides. Rain was shown to reduce residual activity and after three days most insecticides provided very little control of stink bugs. Stink bugs complete at least one generation a year on early season hosts before moving into soybeans. A study of these early season hosts found that rice stink bug was more prevalent on grasses than the other hosts sampled. Brown stink bug was found on all hosts, while other species were not found very frequently. A third study to determine the effects of an automatic insecticide on insect populations in soybeans found that yield was not affected, but stink bug populations later in the year were lowered during the 2011 study