Lawson criterion for ignition exceeded in an inertial fusion experiment

For more than half a century, researchers around the world have been engaged in attempts to achieve fusion ignition as a proof of principle of various fusion concepts. Following the Lawson criterion, an ignited plasma is one where the fusion heating power is high enough to overcome all the physical processes that cool the fusion plasma, creating a positive thermodynamic feedback loop with rapidly increasing temperature. In inertially confined fusion, ignition is a state where the fusion plasma can begin "burn propagation" into surrounding cold fuel, enabling the possibility of high energy gain. While "scientific breakeven" (i.e., unity target gain) has not yet been achieved (here target gain is 0.72, 1.37 MJ of fusion for 1.92 MJ of laser energy), this Letter reports the first controlled fusion experiment, using laser indirect drive, on the National Ignition Facility to produce capsule gain (here 5.8) and reach ignition by nine different formulations of the Lawson criterion

Athletic Trainers' Reasons for and Mechanics of Documenting Patient Care: A Report From the Athletic Training Practice-Based Research Network

Context:  Documenting patient care is an important responsibility of athletic trainers (ATs). However, little is known about ATs\u27 reasons for documenting patient care and mechanics of completing documentation tasks. Objective:  To understand ATs\u27 perceptions about reasons for and the mechanics of patient care documentation. Design:  Qualitative study. Setting:  Individual telephone interviews with Athletic Training Practice-Based Research Network members. Patients or Other Participants:  Ten ATs employed in the secondary school setting (age = 32.6 ± 11.4 years, athletic training experience = 7.1 ± 7.8 years) were recruited using a criterion-based sampling technique. Participants were Athletic Training Practice-Based Research Network members who used the Clinical Outcomes Research Education for Athletic Trainers electronic medical record system and practiced in 6 states. Data Collection and Analysis:  We used the consensual qualitative research tradition. One investigator conducted individual telephone interviews with each participant. Data collection was considered complete after the research team determined that data saturation was reached. Interviews were transcribed verbatim and independently analyzed by 4 research team members following the process of open, axial, and selective coding. After independently categorizing interview responses into categories and themes, the members of the research team developed a consensus codebook, reanalyzed all interviews, and came to a final agreement on the findings. Trustworthiness was established through multiple-analyst triangulation and member checking. Results:  Participants identified 3 reasons for documenting patient care: communication, monitoring patient care, and legal implications. Four subcategories emerged from the mechanics-of-documentation theme: location, time of day, length of time, and criteria for documenting. The ATs described different criteria for documenting patient care, ranging from documenting every injury in the same manner to documenting time-loss and follow-up injuries differently. Conclusions:  Whereas ATs recognized individual mechanisms that enabled them to document patient care, they may need more guidance on the appropriate criteria for documenting various patient care encounters and strategies to help them document more effectively

Severe aberrant glenohumeral motor patterns in a young female rower: a case report

Background: This case features an 18-year-old female with glenohumeral dysrhythmia and subluxation-relocation patterns. This unusual case highlights the need for careful examination and consideration to the anatomical structures involved. Conventional approaches to shoulder examination include range of motion, orthopaedic tests and manual resistance tests. We also assessed the patient's cognitive ability to coordinate muscle function. With this type of assessment we found that co-contraction of local muscle groups seemed to initially improve the patients abnormal shoulder motion. With this information a rehabilitation method was instituted with a goal to maintain the improvement. Case presentation: An 18-year-old female with no history of trauma, presented with painless kinesiopathology of the left shoulder (in abduction) consisting of dysrhythmia of the glenohumeral joint and early lateral rotation of the scapula. Examination also showed associated muscle atrophy of the lower trapezius and surrounding general muscle weakness. We used an untested functional assessment method in addition to more conventional methods. Exercise rehabilitation interventions were subsequently prescribed and graduated in accordance with what is known as the General Physical Rehabilitation Pyramid. Conclusion: This paper presents an unusual case of aberrant shoulder movement. It highlights the need for careful examination and thought regarding the anatomical structures and normal motor patterns associated with the manoeuvre being tested. It also emphasised the use of co-contraction during examination in an attempt to immediately improve a regional dysrythmia if there is suspicion of a regional aberrant motor pattern. Further research may be warranted to test this approach