II. METHODOLOGY A Pasco Human Arm Model was used to simulate the muscles and motion of an actual arm in this lab. Two built-in angle sensors measured the position changes in the shoulder and elbow. Cords were attached to the forearm and threaded through pulleys, to represent either the biceps or the triceps. Force sensors were attached to the cords or the model's hand, to measure the amount of force applied during the activities.
According to your lab instructor, unhook the spring and remove the hanging mass from the centripetal force apparatus and determine the mass Hanging by using a balance. The radial indicator at the one extreme position. Used Vernier caliper to measure the diameter of the center pole, which is on centripetal force. Three times students have to measure the length of the pole, and at the end get an average. Students have to measure the distance between centers of the pole to the center of radial at the range of one.
It will help in improvising the design of currently used prosthetics (based on their radius of curvature values). They act as an indicator in assisting the alignment of prosthetic leg components. The analysis was done using a self-designed inverted-pendulum like apparatus in three different conditions: bare feet, heels and shoes. The centre of pressure coordinates were obtained using a force platform and Visual 3d software and were transformed from a laboratory based system to shank based system. The ankle-feet roll over shapes were plotted using origin and excel.
It was as if a hatchet lay lodged in his leg. Slicing through each nerve with a hot blade (108-109).” This particular memory of Jonas’ tells of what happened when climate wasn’t controlled and the ice would cause injuries. With Climate Control, injuries caused by the harsh weather of winter are avoided. Secondly, “‘Snow made growing food difficult, limited the agricultural periods. And unpredictable weather made transportation almost impossible at times.
Figure 4 Histological findings show a subchondral fracture of the femoral head and no evidence of antecedent osteonecrosis. (A) Mid-coronal cut section of the resected left femoral head shows a linear fracture line paralleling the subchondral bone endplate. (B) The photomicrograph obtained from the subchondral fractured lesion shows marked fracture callus and vascular rich granulation tissue (hematoxylin and eosin, ×100). Learning points Preventing post-traumatic osteoarthritis is a challenging problem in patients with acetabular
AIM To compare the retention force value alterations of four different types of implant overdenture attachments over various time intervals. MATERIALS AND METHODS 28 cuboidal blocks were fabricated using autopolymerising acrylic resin. Four of these were used as master blocks, one for each group. Master blocks for Group A and B contained an implant analog with ball abutment, for Group C contained a single piece implant with ball abutment and for Group D contained an implant analog with Locator abutment. Six blocks for each group were used as prosthetic blocks, which included the overdenture attachment to be studied.
Often no cross-match can be identified. This could be due to the use of imported timber for example. To add to the confusion, often the date that the timber had fallen is not the same as the date of construction of a building it was used for. A surprisingly early date may suggest the use of salvaged timbers. Sapwood is highly susceptible to decay particularly by beetle larvae.
In the experiment there will be three trials, in the first one the magnesium strip will be inserted as a whole piece, in the second it will be cut into smaller pieces, and in the third into even smaller pieces. Dependent: In the experiment, I will measure rate of reaction of the magnesiums surface area. I will measure this with the stopwatch during the experiment. And to keep track of the results, I will annotate the results on my notebook. Controlled: What I will control?
Lab 2: Force Angle relationship 250 words 4 marks In this lab we concentrated on investigating the relationship between joint angle and consequential ability of muscles to produce force. The knee joint was focused on with the quadriceps (rectus femoris, vastus lateralis, vastus intermedialis vastus medialis) and hamstrings (semitendinosus, semimembranosus. biceps femoris lomg head and short head) being the main muscle groups studied. A relationship exists between the length of the muscle before the onset of contraction and the tetanic tension that each contracting fibre can subsequently develop at that length (Sherwood 2010). For every muscle there is an optimal length at which maximal force can be achieved on a subsequent tetanic contraction.
The problems we found during the lab were that the spring scales were not calibrated or they were broken. We also had some bad data on the second scale (.06, 1) it was a lot of weight compared to the mass, and you can see on the graph that it is in a weird place and not near the line of best fit. Non of those errors messed up the lab too much. Since Fg=m*g, an acceleration due to gravity (g) on earth is always 9.8m/s^2. Theory says that the more mass the more weigh.