Double Kick Research Articles

Fracton Infrared Triangle.

In theories with conserved dipole moment, isolated charged particles (fractons) are immobile, but dipoles can move. We couple these dipoles to the fracton gauge theory and analyze the universal infrared structure. This uncovers an observable double kick memory effect which we relate to a novel dipole soft theorem. Together with their asymptotic symmetries this constitutes the first realization of an infrared triangle beyond Lorentz symmetry. This demonstrates the robustness of these IR structures and paves the way for their investigation in condensed matter systems and beyond.

Pilates Exercise in Hypoxia Increases Vascular Endothelial Function in Professional Pilates Players

PurposeThe purpose of this study was to investigate the pilates exercise in hypoxia increases vascular endothelial function in professional Pilates players.MethodsTen healthy Pilates expert female (age: 26.9 ± 2.7, weight: 50.8 ± 5.2, BMI: 19.3 ± 1.4) completed two different trials on different days, consisting of exercise in normoxia (N trial) and exercise in 3,000 m simulated altitude (526 mmHg) hypobaric hypoxia (H trial). After 30 minutes of exposure in each environment, they performed tubing Pilates exercise for 50 minutes under normoxia and hypoxia. Pilates exercise using tubing were composed of 25 types, each performed for 2 minutes. Pilates motion is configured as follows : roll up & down, biceps, arm circles, teaser, rolling, spine twist, mermaid, cobra, swimming, double kicks, swan, cat, thigh stretching, hug a tree, squat, row, saw, hip pull, hundred, lats pull, leg arc, scissor, helicopter, right side leg pull, left side leg pull. Metabolic parameters (minute ventilation; VE, oxygen uptake; VO2, carbon dioxide excretion; VCO2, respiratory exchange ratio; RER, carbohydrate oxidation; CO, fatty acid oxidation; FAO, energy expenditure; EE) and cardiac function (heart rate; HR, stroke volume; SV, cardiac output; CO, end‐diastolic volume; EDV, end‐systolic volume; ESV, ejection fraction; EF) were measured every minutes during Pilates exercise. The sum of the values measured for 50 minutes was used as the result (exceptionally, RER uses average values). Blood pressure (BP), branchial ankle pulse wave velocity (baPWV) and flow mediated dilation (FMD) in branchial artery were measured as vascular function before and after exercise.ResultsIn metabolic parameters, H trial showed significantly higher VE, VCO2, RER and CO than N trial. However, FAO was lower in H trial than in N trial. VO2 and EE. VO2 and EE presented no significant difference between the two trials. In cardiac function, HR showed a significant increase in H trial compared with N trial, however, the remaining cardiac function parameters did not show significant difference. In vascular function, BP (systolic blood pressure, diastolic blood pressure, pulse pressure and mean arterial pressure) and baPWV did not show significant interaction effects between exercise and environment. However, FMD presented a significant interaction effects between exercise and environment. As a result of the post‐hoc, both trial showed a significant increase in FMD via exercise and the increase rate in FMD was significantly higher in H trial (48.5 ± 22.9) than in N trial (34.9 ± 18.3). Also, H trial showed a significantly higher FMD before exercise than N trial.ConclusionOur results suggest that Pilates exercise under moderate hypoxia shows greater metabolic and cardiac response by relatively higher exercise intensity, and it also elicit synergy effect on vascular endothelial function than under normoxia in professional Pilates players.

Femoral Nerve Palsy Following Iliacus Hematoma

We report a rare case of femoral nerve palsy secondary to hematoma compression of the iliacus. The patient presented with pain 2 days after performing a double kick in karate. The femoral nerve symptoms (numbness and weakness) did not begin until 3 to 4 days after the initial trauma. Magnetic resonance imaging (MRI) confirmed that there was a hematoma compressing the iliacus (and femoral nerve). This hematoma was subperiosteal, within the iliac fossa. This case is rare because the femoral nerve palsy resolved without surgical intervention, the mechanism of injury, the imaging used to diagnose the iliacus hematoma, and the hematoma was subperiosteal and not within the actual iliacus muscle. A review of the literature regarding femoral nerve palsy secondary to traumatic iliacus hematoma is presented. If the diagnosis of femoral nerve palsy secondary to iliacus hematoma is suspected after history and physical examination, MRI is the imaging study of choice. If MRI does not depict a discreet hematoma mass, nonoperative management should be considered. Electromyography has not been shown to offer information that was not provided by history, physical examination, and other imaging. Surgery should be considered if there is progression of the femoral nerve symptoms, or if MRI depicts a discreet collection of blood impinging on the femoral nerve.

Ensuring Two Bird Deaths With One Throw

Crossing a plain, I come to what looks like a gigantic mirror. But pushing a hand against it, I feel flesh and not glass. The universe must be symmetric, flesh that of my double-left-right reversed but otherwise a perfect replica. The universe must also be fully deterministic, for how else could my double have moved exactly as I did? But never having seen freedom and determinism as incompatible, I find this untroubling. In fact I rejoice. My decision-making ability, I tell myself, is not limited by any admixture of quantum randomness such as would make me in part a puppet pulled by strings of Chance. Do I not actually have twice power I earlier seemed to have? Besides governing my own hands and legs, do I not govern others too? Cannot I make my double kick, wave, clap, whenever I want? Cannot I throw two stones instead of one?-the stone I hurl to kill a bird, and second stone which my double hurls simultaneously? If ever I controlled what my image did in a mirror, why deny that I control what my double does? Well, grounds for denying it are easy to find. Yes, universe-halves interact. I can smash against my double painfully, and while unable to enter his half of universe (he keeps getting in way!) I have no problem in seeing him since light waves pass through each other instead of colliding and bouncing back. Yet he and I are in crucial respects independent. Seeing a snake sneaking up on him, it is not of that particular snake that I feel afraid but of other which I thereby know to be sneaking up on me. It is my fear which makes me run, my double's fear which makes him do likewise. I do not genuinely cause him to run by myself running. Maybe my double moves as he does because I move as I do. It might even be said that heaviness of rock in my hand causally explains why he drops his rock when I drop mine. Rather similar senses of because and causally explain are recognized by Frank Jackson and Philip Pettit (1988, esp. pp. 392-3). The sameness of force on two electrons causally explains why they accelerate at same rate, they write. And why was price of lamb identical at two auctions? Because, they say (and it is surely a because of Ordinary English), the relationship between supply and demand was same. Yet fact remains that stone killing bird in other half of universe is accelerated by my double's hand, not mine. I do not throw two stones. Still, by choosing to run I can ensure that my double runs. While I cannot strictly speaking make him throw stones, I can make it certain that he will. I have only to decide firmly to throw stones myself.

The cause of multiple discharges in a Geiger-M ller counter

The formation of double kicks in a Geiger-Müller counter has been investigated experimentally. It is shown that they can be produced by the presence of small amounts of xylene vapour in the counter, and that the double kick is due to the release of an electron from the cathode when the xylene ions are discharged 10-3 sec. after the first discharge.