Efficient deterministic secure quantum communication protocols using multipartite entangled states

We propose two deterministic secure quantum communication protocols employing three-qubit GHZ-like states and five-qubit Brown states as quantum channels for secure transmission of information in units of two bits and three bits using multipartite teleportation schemes developed here. In these schemes, the sender’s capability in selecting quantum channels and the measuring bases leads to improved qubit efficiency of the protocols.     

水电站财产投保的思考

水电站除了必须有严格的生产管理制度,完善落实好防汛预案以外,对财产进行保险也是降低损失和转移风险的有效手段;这可以增强水电站抗风险、防大灾的能力,确保汛期机电设备高效、安全地运行。详细介绍了水电站财产投保的注意事项和财产损失的评估经验。     

Reticular inhibition of evoked potentials of the ventro-basal thalamus and somatosensory cortex of the rat brain

In rats immobilized with d-tubocurarine conditioning electrical stimulation (100/s, 300 ms) of the central grey matter, reticular formation of the midbrain and medulla depressed focal potentials in thalamic ventro-basal complex and somatosensory cortex evoked by electrical stimulation of the forelimb or medial meniscus. The average threshold current for conditioning stimulation of these structures was 70, 100 and 120 muA. A comparison of intensity and duration of evoked potentials depression (for two-fold threshold stimulation of the brain stem) is failed to detect any difference between the stimulated structures: immediately after conditioning stimulation the amplitude of the cortical evoked potentials and post-synaptic components of the evoked potentials in the ventro-basal complex were 50-60% less than control amplitude (p less than 0.01) the depression persisting for 0.5-1 s. The presynaptic component of the thalamic evoked potentials was depressed only after three five-fold threshold conditioning stimulation. The brain stem stimulation did not cause any facilitatory effect on focal potentials evoked by maximal and submaximal stimulation of the forelimb or medial lemniscus.     

Effect of pharmacotherapy of affective disorders on the psycho-semantics of alcoholic patients

90 alcoholic patients (II stage of alcoholism) with secondary affective disorders (anxiety, depression) were divided into 4 groups. The patients of the first group received the GABA receptor ligand baclofen during 3 weeks. Sybazon preparation was used in the second group, while the patients of the third group were treated with amitriptyline. Placebo was applied in the forth group. The clinical psychological tests demonstrated that all drugs caused quite effective relief of affective disorders. Psychosemantic tests application showed that the pharmacotherapy caused positive changes in patients of 1-3 groups. These changes touched on both system of personal estimations and relations of personality to himself and to the world around i.e. psychosemantic sphere. Such changes in psychosemantic sphere were not observed in the 4-th group of patients (placebo). Besides it was revealed that each drug caused some specific changes in psychosemantic sphere. The result obtained were supposed to have some theoretical value in comprehension of brain-psychics relations as well as the applied significance for adequate choice of affective disorders pharmacotherapy of alcoholic patients.     

On chip droplet characterization: a practical, high-sensitivity measurement of droplet impedance in digital microfluidics

We demonstrate a new approach to impedance measurement on digital microfluidics chips for the purpose of simple, sensitive, and accurate volume and liquid composition measurement. Adding only a single series resistor to existing AC droplet actuation circuits, the platform is simple to implement and has negligible effect on actuation voltage. To accurately measure the complex voltage across the resistor (and hence current through the device and droplet), the designed system is based on software-implemented lock-in amplification detection of the voltage drop across the resistor which filters out noise, enabling high-resolution and low-limit signal recovery. We observe picoliter sensitivity with linear correlation of voltage to volume extending to the microliter volumes that can be handled by digital microfluidic devices. Due to the minimal hardware, the system is robust and measurements are highly repeatable. The detection technique provides both phase and magnitude information of the real-time current flowing through the droplet for a full impedance measurement. The sensitivity and resolution of this platform enables it to distinguish between various liquids which, as demonstrated in this paper, could potentially be extended to quantify solute concentrations, liquid mixtures, and presence of analytes.