Screw-pitch effect and velocity oscillation of domain-wall in ferromagnetic nanowire driven by spin-polarized current

We investigate the dynamics of domain wall in ferromagnetic nanowire with spin-transfer torque. The critical current condition is obtained analytically. Below the critical current, we get the static domain wall solution which shows that the spin-polarized current can't drive domain wall moving continuously. In this case, the spin-transfer torque plays both the anti-precession and anti-damping roles, which counteracts not only the spin-precession driven by the effective field but also Gilbert damping to the moment. Above the critical value, the dynamics of domain wall exhibits the novel screw-pitch effect characterized by the temporal oscillation of domain wall velocity and width, respectively. Both the theoretical analysis and numerical simulation demonstrate that this novel phenomenon arise from the conjunctive action of Gilbert-damping and spin-transfer torque. We also find that the roles of spin-transfer torque are entirely contrary for the cases of below and above the critical current

An Analysis on Syntactic and Semantic Factors Found in Newspaper Headlines

As a type of media text, newspaper has an important role in human\u27s life because it presents various local, national and International information and events. In order to attract readers\u27 attention, journalists make the headlines as ambiguous and confusing as possible so that readers are curious to know the content of the whole story and they would read it. Moreover, in presenting the information or events, different reporters will have different linguistic choices which include the choice of words and expressions and different linguistic structures. Thus, this paper analyzes how the different linguistic choices and structures used in the headlines of The Jakarta Post and Indonesian Daily News would construct different linguistic representations of events in the world

Memperbaiki Saturasi Oksigen, Frekuensi Denyut Jantung, Dan Pernafasan Neonatus Yang Menggunakan Ventilasi Mekanik Dengan Terapi Musik

Improving Oxygen Saturation, Heart Rate, and Respiratory Rate of Neonates Using Mechanical Ventilation with Music Therapy. Neonates using mechanical ventilation cause of respiratory disorder experience oxygenation and heart rate problems. Interventions should be made in order to calm neonates so that the need of oxygen can be minimized, one of these interventions is music therapy. This study aimed to identify the effect of music therapy on oxygen saturation, heart rate and respiratory rate of neonates using mechanical ventilation. This quasi experiment study with a pretest-posttest design without control involved 13 neonates selected by consecutive sampling. Data collected through observation and analyzed by paired t test. There was a significant difference on the average of oxygen saturation, heart rate and respiratory rate of infants using mechanical ventilation before and after music therapy (p value <0,05). Music therapy can be used as a complementary medical therapies to improve oxygenation in neonates using mechanical ventilation