High-quality uniform dry transfer of graphene to polymers

In this paper we demonstrate high-quality, uniform dry transfer of graphene grown by chemical vapor deposition on copper foil to polystyrene. The dry transfer exploits an azide linker molecule to establish a covalent bond to graphene and to generate greater graphene-polymer adhesion compared to that of the graphene-metal foil. Thus, this transfer approach provides a novel alternative route for graphene transfer, which allows for the metal foils to be reused.     

能够产生连续电弧的1kV电源

设计一种能够产生连续电弧的高压开关电源可能是具有挑战性的.这种小巧高效的开关电源在输出功率为20W时可输出1kV电压,并能耐受连续电弧(即短路)(图1).它使用标准的市售元件.使用R1将开关稳压控制器LTC1871设定在120kHz的额定工作频率.该电路像间断式回扫电路一样工作,在C1上产生333V电压.二极管/电容器电荷泵倍增器把该电压升高到三倍,在输出端产生1000V电压.图2示出了该电路产生的开关波形.当初级开关Q1导通时,输出整流器被反向偏置,能量存储于变压器T1中.当Q1截止时,能量传输到次级线圈,C2和C3通过整流器提高输出电压.初级电压升高,并通过变压器和整流器D1箝位为C1上的电压.变压器耦合良好,所以漏电感几乎不会造成电压尖脉冲.跨接在初级线圈上的小型RC阻尼器可衰减阻尼振荡,并降低EMI(电磁干扰).     

The influence of wear on stresses in PCD inserts

The paper addresses the behavior of maximum stresses on the tool face and flank and the tool failure probability with increasing wear. The maximum tool life is calculated from the wear rate diagram. The authors provide some research findings on the influence of a Ni-resist cast iron embedded in the piston on the wear resistance of a PCD insert.     

A nationwide survey of recorded information used for calculating distribution reliability indices

Reliability is one of the most discussed topics in the power industry today. Although many questions are being asked about the reliability of utility systems across the US, there are no standards for recording or measuring interruption minutes, number of customers affected, major events, whether to include transmission and or distribution as well as many other issues. The methods used for calculating the indices and the definitions for the information have a major role in calculating reliability measures as defined in an IEEE standard. This paper provides the results of a nationwide survey on the recording or measuring of data used to calculate reliability indices and associated practices. It points out some of the pitfalls of using differing methodologies in the recording of data behind the measures. These differences often cause discrepancies when comparing reliability indices between utilities.     

Human Mycobacterium bovis infection in the south-west of Ireland 1983-1992: a comparison with M. tuberculosis

Epidemiological and bacteriological aspects of human Mycobacterium bovis disease were investigated in south-west Ireland (counties Cork & Kerry, population 536,000) over the years 1983-92 inclusive and compared to M. tuberculosis. Results showed a small, stable incidence of culture positive M. bovis human disease, mean annual incidence 0.56 per 100,000 population compared to a higher but declining incidence of culture positive M. tuberculosis (15.3 per 100,000 in 1983, 9.0 per 100,000 in 1992). Male patients were the majority, 63.4 per cent of M. bovis; 62.4% of M. tuberculosis (p = 0.03). Fifty three per cent of M. bovis cases (n = 30) were pulmonary, compared to 85% of M. tuberculosis (n = 626; p = 0.0001). M. bovis patients were older (p = 0.02), mean age 58.4 years (SD 18.9) compared to 48.5 (SD 22.2). The mycobacterial smear positive rate was similar in both groups taken as a whole. No rural-urban difference in incidence was found in either disease, suggesting in the case of M. bovis initial infection in childhood via contaminated milk in the pre-pasteurisation era.     

Three-dimensional object representation and invariant recognitionusing continuous distance transform neural networks

3D object recognition under partial object viewing is a difficult pattern recognition task. In this paper, we introduce a neural-network solution that is robust to partial viewing of objects and noise corruption. This method directly utilizes the acquired 3D data and requires no feature extraction. The object is first parametrically represented by a continuous distance transform neural network (CDTNN) trained by the surface points of the exemplar object. The CDTNN maps any 3D coordinate into a value that corresponds to the distance between the point and the nearest surface point of the object. Therefore, a mismatch between the exemplar object and an unknown object can be easily computed. When encountered with deformed objects, this mismatch information can be backpropagated through the CDTNN to iteratively determine the deformation in terms of affine transform. Application to 3D heart contour delineation and invariant recognition of 3D rigid-body objects is presented.     

Real and simulated occurrences of memory distortion in hypnosis.

79 undergraduates were prescreened for high or low susceptibility to hypnosis (Harvard Group Scale of Hypnotic Susceptibility—Form A) and tested individually to examine memory distortion in hypnosis. Independent groups of Ss were allocated to a 2?×?2 factorial design in which S grouping (hypnotic or simulating) was crossed with an information condition that either misled or did not mislead Ss about a series of scenes depicting an apparent robbery. It was hypothesized that memory distortion would characterize the performance of hypnotic Ss when memory was examined in unstructured, narrative recall. Results show that real Ss were differentiated appreciably from simulating Ss in the extent to which they incorrectly intruded uncued errors (i.e., errors not arising from misleading information) into their memories but not in their intrusion of cued errors (i.e., errors arising from misleading information). Real Ss remembered correctly more detail of a peripheral kind but also distorted more with respect to the same kind of detail. Results overall negate the view that earlier memory traces are revived in hypnosis, thereby leading to more accurate retrieval, and suggest that hypnotic Ss bring distinctive styles of information processing to bear on their recollections of complex, socially meaningful events. (28 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Analysis of the treatment effects of simulation instructions in the application of the real simulating model of hypnosis.

385 Ss were given a sentence completion and a word association test. Later, 12 high- and low-susceptible Ss were asked before and after the induction to hypnosis to complete a test battery containing the 2 tests. Insusceptible Ss simulated hypnosis for an E who was blind as to S's susceptibility to trance. Critical comparison was between initial testing and testing before hypnotic induction was attempted. Results support the hypothesis. Simulators differed in their performance on the sentence completion test, showing less evidence of conflict after receiving instructuions to role play. Hypnotic Ss showed no difference between the 2 testings. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Experiential analysis of hypnosis: Some new observations on hypnotic phenomena.

10 Ss who were assessed on the Harvard Group Scale of Hypnotic Susceptibility as being highly susceptible to hypnosis were shown videotaped versions of their previous hypnotic sessions in the presence of an independent inquirer who attempted to foster Ss' personal comments on their own experiences. A special method of inquiry called the "experiential analysis technique" was constructed to study Ss' recall, which was examined for fantasy involvement, rapport, and individual modes of cognition. Data from the application of the method indicate the idiosyncratic ways in which Ss interpret routine suggestions, the degree to which they become personally involved with the hypnotist, and 3 distinct modes of cognizing, which were labeled "concentrative-cooperative," "cognitive-independent," and "cognitive-constructive." (9 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The impact of videotape playback of hypnotic events on posthypnotic amnesia.

Examined the breakdown of amnesia by showing 48 hypnotic and nonhypnotic undergraduates (Harvard Group Scale of Hypnotic Susceptibility) a videotape of the hypnotic events they had experienced. The extent of the amnesia for these events was defined precisely, and simulating procedures were employed to analyze the cues in the overall test situation. Videotape display of the hypnotic events was presented via the Experiential Analysis Technique and served to optimize conditions for breakdown. Some hypnotic Ss' amnesia could not be broken down even though they were exposed via videotape playback to the events to be recalled and when suggestions for the period of amnesia were quite explicit. Simulators showed breaching of amnesia but attributed their recall to the videotape rather than to the hypnotic session. Hypnotic Ss were distinctive in their inability to recall experiential aspects of their performance even though they could recall behavioral aspects. The data are discussed in relation to the hypothesis that dissociative cognitive mechanisms underlie posthypnotic amnesia. (22 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)