BitBilliards

The goal of the project is to create a billiards table capable of keeping track of the score while simultaneously racking the sunk balls under the table. To achieve this, image processing will be utilized to detect and determine which balls are above and below the table. Upon leaving the table, the balls will be held by gates to prevent the cue ball from entering the re-racking track. The balls will then enter the track and form a queue to be placed back into the triangle underneath the table. A gantry system consisting of an x and y axis will place the waiting billiard balls into their corresponding positions in the triangle. Throughout this process, data will be sent to a remote server which will provide the live game updates to the app. The app will be capable of showing the current score and status of the game, including images of the table. All of these improvements will help bring more viewers to the competitive pool scene while decreasing the delay between games

Network Security: Internet Protocol Version Six Security

It is no secret that the pool of public internet addresses available with Internet Protocol version Four (IPv4) is gone. (Morphy, 2011) Thus the migration to the more roomy Internet Protocol version Six (IPv6) has begun. This migration is a complex process including different security procedures and updates that require time and knowledge. This paper will dive into scientific writings, with databases like Scopus and IEEE, about various security risks in the IPv6 protocol such as tunneling practices, router issues and issues with Internet Protocol Security (IPsec). This paper will overview security practices to better clarify common vulnerabilities in IPv6. While some configurations cause issues with host safety, it is commonly noted that due to user error most of the attacks escalate more than they should. Network professionals should be informed about IPv6 security issues in order to best protect a system. Information on IPv6 security risks is crucial to protecting against an attack before it happens and minimizing damage when real time attacks take place

IDENTIFYING THE RELATIONSHIP BETWEEN PREPARATORY MECHANICS AND AN ATHLETES RISK OF ACL INJURY: A PRELIMINARY ANALYSIS

This study investigated whether an athlete's mechanics during the preparatory phase of unplanned sidestepping predicted peak valgus knee moments during weight acceptance. Nine female community level team sport athletes completed an established sidestepping movement assessment. Preparatory anterior-posterior trunk momentum and left-right lateral trunk momentum, alongside trunk flexion range of motion during weight acceptance combined to predict 57% of the variance in peak knee valgus moments. These preliminary results show that preparatory trunk mechanics are related to subsequent peak knee valgus moments and anterior cruciate ligament injury risk during unplanned sidestepping. A data set of 11 6 mixed characteristic athletes is currently being analysed to verify these findings

Genetic selection for active E.coIi amber tRNAASn exclusively led to glutamine inserting suppressors

International audienceSuppressor tRNAs are useful tools for determining identity elements which define recognition of tRNAs in vivo by their cognate aminoacyl-tRNA synthetases. This study was aimed at the isolation of active amber tRNAASn. Nineteen mutated tRNAASnfcuA having amber suppressor activity were selected by an in vivo genetic screen, and all exclusively inserted glutamine. From analysis of the different mutations it is concluded that glutamine accepting activity was obtained upon reducing the interaction strength between the first base pair of the tRNAASnfCuA by direct or indirect effects. Failure to isolate tRNAASnfcuA suppressors charged with asparagine as well as other evolutionary related amino acids is discussed

Synthesis of Subject-Specific Human Balance Responses using a Task-Level Neuromuscular Control Platform

Many activities of daily living require a high level of neuromuscular coordination and balance control to avoid falls. Complex musculoskeletal models paired with detailed neuromuscular simulations complement experimental studies and uncover principles of coordinated and uncoordinated movements. Here, we created a closed-loop forward dynamic simulation framework that utilizes a detailed musculoskeletal model (19 degrees of freedom, and 92 Muscles) to synthesize human balance responses after support-surface perturbation. In addition, surrogate response models of task-level experimental kinematics from two healthy subjects were provided as inputs to our closedloop simulations to inform the design of the task-level controller. The predicted muscle EMGs and the resulting synthesized subject joint angles showed good conformity with the average of experimental trials. The simulated whole-body center of mass displacements, generated from a single kinematics trial per perturbation direction, were on average, within 7 mm (anterior perturbations) and 13 mm (posterior perturbations) of experimental displacements. Our results confirmed how a complex subject-specific movement can be reconstructed by sequencing and prioritizing multiple task-level commands to achieve desired movements. By combining the multidisciplinary approaches of robotics and biomechanics, the platform demonstrated here offers great potential for studying human movement control and subject-specific outcome prediction

Primary structure and location of the genome-linked protein (VPg) of grapevine fanleaf nepovirus

AbstractThe genome linked protein VPg covalently linked to the RNAs of grapevine fanleaf nepovirus has been sequenced. The VPg (Mr=2931) composed of 24 residues is linked by its N-terminal Ser β-OH group to the viral RNAs. The VPg mapped from residues 1218 to 1241 of the 253K polyprotein encoded by GFLV RNA1

Knee Joint Loads and Surrounding Muscle Forces during Stair Ascent in Patients with Total Knee Replacement

Total knee replacement (TKR) is commonly used to correct end-stage knee osteoarthritis. Unfortunately, difficulty with stair climbing often persists and prolongs the challenges of TKR patents. Complete understanding of loading at the knee is of great interest in order to aid patient populations, implant manufacturers, rehabilitation, and future healthcare research. Musculoskeletal modeling and simulation approximates joint loading and corresponding muscle forces during a movement. The purpose of this study was to determine if knee joint loadings following TKR are recovered to the level of healthy individuals, and determine the differences in muscle forces causing those loadings. Data from five healthy and five TKR patients were selected for musculoskeletal simulation. Variables of interest included knee joint reaction forces (JRF) and the corresponding muscle forces. A paired samples t-test was used to detect differences between groups for each variable of interest (p\u3c0.05). No differences were observed for peak joint compressive forces between groups. Some muscle force compensatory strategies appear to be present in both the loading and push-off phases. Evidence from knee extension moment and muscle forces during the loading response phase indicates the presence of deficits in TKR in quadriceps muscle force production during stair ascent. This result combined with greater flexor muscle forces resulted in similar compressive JRF during loading response between groups

USE OF MUSCULOSKELETAL MODELING TO FIND THE BALANCE BETWEEN PERFORMANCE AND INJURY PREVENTION IN SPORTS – A PROOF OF CONCEPT

In this study we used musculoskeletal modelling with mathematical optimization tools to find whole-body kinematics that simultaneously reduce risk of injury and enhance sports performance. Combining these objectives has long been the goal of sports science research. We focused on improving hang-time parameters in volleyball (Gupta et al., 2015). We were able to preserve an advantage of hang-time (late swing) and address its disadvantage (potential loss in peak height of the hitting arm) by increasing the height of the hitting wrist by 1 cm, while at the same time not increasing the shoulder moments. This study provided a proof of concept that this optimization framework can potentially find a balance between performance and injury prevention in a complex sports task