Simple and active magnetic-field stabilization for cold atom experiments.

Cold atom experiments usually need a controllable and low-noise bias magnetic field to provide a quantization axis. Most labs need home-made stabilization of the field according to the actual setup, as commercially available power supply cannot directly satisfy their requirements. Here, by measuring the field fluctuations and active feedback modulating current supply of the applied magnetic field, we successfully demonstrate a field of 10.

State-resolved dynamics study of the H + HS reaction on the A' and A″ states with time-dependent quantum wave packet method.

The quantum dynamics calculations of the H + HS (v = 0, j = 0) reaction on the A' and A″ potential energy surfaces (PESs) are performed using the reactant coordinate based time-dependent wave packet method. State-averaged and state-resolved results for both channels of the title reaction are presented in the 0.02-1.

Could a traumatic epidural hematoma on early computed tomography tell us about its future development? A multi-center retrospective study in China.

Our aim for this study was to quantitatively develop an early epidural hematoma (EDH) natural evolutionary curve and assess association of the most common radiological signs of initially nonsurgical supratentorial EDHs on early computed tomography (CT), in addition to their CT time for EDH enlargement. We retrospectively reviewed pertinent data of supratentorial EDH cases with CT ≤ 6 h postinjury (1997-2013) in three medical institutions in Shanghai. Cases involved were divided into six groups according to their initial CT time postinjury (≤ 1, 1-2, 2-3, 3-4, 4-5, and 5-6 h for groups 1 through 6, respectively).

Quasiclassical dynamics for the H + HS abstraction and exchange reactions on the 3A" and the 3A' states.

A detailed quasiclassical trajectory study of the H + HS reaction yielding an exchange (H + HS) and an abstraction (H2 + S) channel has been performed by employing the new triplet (3)A" and (3)A' surfaces developed by our group. The cross sections for both channels are presented and found to be in good agreement with previous quantum wave packet results. The thermal rate coefficients for abstraction channel at the temperature between 200 and 1000 K have been evaluated by averaging over a Boltzmann distribution of rotational states and compared with the available experimental values.

A new rat model for diffuse axonal injury using a combination of linear acceleration and angular acceleration.

Diffuse axonal injury (DAI) is a frequent form of traumatic brain injury, and is usually associated with long-lasting neurological impairments. A new experimental model was developed in the present study to induce DAI in rats by combining low linear and angular accelerations. In most clinical scenarios, DAI is caused by these two forms of acceleration in combination.

Sinus pericranii in the right frontal region and thrombosis.

Sinus pericranii is a rare vascular anomaly in which an abnormal communication exists between the extracranial venous system and the underlying dural venous sinus via the diploe of the skull. We describe a case of a spontaneous thrombosis of the sinus pericranii which was located in the right frontal region and presented as a focal, leathery, and noncompressible mass distinguished in character from the typical manifestation of sinus pericranii. In this case, CT, DSA, MRI, MR venography (MRV), and pathologic examination were performed.

Giant intradiploic epidermoid cyst of the occipital bone.

Epidermoid cysts are uncommon, benign and slow-growing lesions. They often reach an enormous size without producing neurologic symptoms. We describe a 35-year-old female who had a giant intradiploic epidermoid cyst of the occipital bone.