乙醇浸泡法对光纤物理性能的影响

目前,越来越多的光纤光缆在世界各地投入使用.由于对光纤涂覆层的性能不够了解,一些光缆安装人员在光缆安装或光纤连接之前将光缆和光纤长时间浸泡在乙醇类的溶剂中,以节省清洁时间.通过一系列先进的测试技术,如剥离力、In-situ模量、动态疲劳值以及In-situ动态机械分析等的分析,证明了乙醇类溶剂对光纤以及光缆性能有一定的影响.     

Giant Electric Field Tuning of Magnetic Properties in Multiferroic Ferrite/Ferroelectric Heterostructures

Multiferroic heterostructures of Fe₃O₄/PZT (lead zirconium titanate), Fe₃O₄/PMN‐PT (lead magnesium niobate‐lead titanate) and Fe₃O₄/PZN‐PT (lead zinc niobate‐lead titanate) are prepared by spin‐spray depositing Fe₃O₄ ferrite film on ferroelectric PZT, PMN‐PT and PZN‐PT substrates at a low temperature of 90 °C. Strong magnetoelectric coupling (ME) and giant microwave tunability are demonstrated by a electrostatic field induced magnetic anisotropic field change in these heterostructures. A high electrostatically tunable ferromagnetic resonance (FMR) field shift up to 600 Oe, corresponding to a large microwave ME coefficient of 67 Oe cm kV^?1, is observed in Fe₃O₄/PMN‐PT heterostructures. A record‐high electrostatically tunable FMR field range of 860 Oe with a linewidth of 330–380 Oe is demonstrated in Fe₃O₄/PZN‐PT heterostructure, corresponding to a ME coefficient of 108 Oe cm kV^?1. Static ME interaction is also investigated and a maximum electric field induced squareness ratio change of 40% is observed in Fe₃O₄/PZN‐PT. In addition, a new concept that the external magnetic orientation and the electric field cooperate to determine microwave magnetic tunability is brought forth to significantly enhance the microwave tunable range up to 1000 Oe. These low temperature synthesized multiferroic heterostructures exhibiting giant electrostatically induced tunable magnetic resonance field at microwave frequencies provide great opportunities for electrostatically tunable microwave multiferroic devices.     

Online and Uncivil? Patterns and Determinants of Incivility in Newspaper Website Comments

Incivility in public discussions has received increasing attention from academic and popular commentators in recent years. In an effort to better understand the nature and determinants of such incivility, this study examined a 3‐week census of articles and comments posted to a local newspaper's website—totaling more than 300 articles and 6,400 comments. The results of the content analysis show that incivility occurs frequently and is associated with key contextual factors, such as the topic of the article and the sources quoted within the article. We also find that, contrary to popular perceptions, frequent commenters are more civil than are infrequent commenters, and uncivil commenters are no less likely than civil commenters to use evidence in support of their claims.     

Review of An objective psychology of music.

Reviews the book An objective psychology of music by (see record 1954-00590-000). The reviewer notes that this book is a noteworthy addition to the psychology of music, especially for classroom use with the undergraduate student. Its style is clear and simple, its coverage is unusually comprehensive, and its range is wide. It will truly facilitate the learning process for the student, an advantage which has often been lacking in this field. The psychology of music demands an understanding of two very different disciplines, one of them a science, the other an art. The vocabulary and style employed by the artist has often proved baffling to the scientist, and vice versa. Lundin has shown a special talent as an interpreter, and has made his material thoroughly clear to both. His occasional oversimplifications will prove justifiable in terms of the student who seeks competency in two fields. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effectiveness of booster sessions in the maintenance and enhancement of treatment gains following assertion training.

46 unassertive Ss were randomly assigned to assertion training (AT) or waiting-list control conditions. Ss receiving AT showed significantly greater improvements from pretreatment to posttreatment on 8 out of 10 questionnaire measures of assertiveness and 3 out of 5 direct behavioral observation measures compared with the waiting-list group. 27 Ss who had completed the AT program were then randomly assigned to 1 of 3 booster conditions, namely, monthly AT boosters (ATB), monthly attention placebo boosters (APB) or no boosters (NB). At the 3-mo follow-up there was minimal difference between booster conditions. By the 6-mo follow-up the results favored the ATB condition. Although the APB procedure was effective in preventing the relapse shown by the NB Ss, the ATB group actually showed further improvements on some measures of assertiveness during the 6-mo follow-up period. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Identification of high-risk groups among node-positive patients with stage IB and IIA cervical carcinoma

1. Mice were given sodium valproate (0.71%) in the drinking fluid for 21 days. The antinociceptive activity, locomotor activity and body temperature changes were recorded at 7, 14 and 21 days. The possible carryover antinociceptive effects were also determined after valproate withdrawal for up to 3 days after 7-, 14- and 21-day treatment. 2. The antinociceptive activity was present only on days 7, 14 and 21 and, on withdrawal of the drug, the antinociceptive activity disappeared. 3. Thus, with this regimen of valproate administration, there was no persistent antinociceptive activity (carryover effect). There were essentially no effects of valproate on the locomotor activity and body temperature of mice. The antinociceptive effects were due to the presence of the drug and disappeared on valproate's withdrawal.     

Profiling of genetic variants of bovine κ-casein macropeptide by electrophoretic and chromatographic techniques

Bovine κ-caseins of single variant phenotype (AA and BB) and mixed phenotype (AA, BB and AB) were purified from milk and the corresponding κ-casein macropeptides prepared by chymosin hydrolysis. The macropeptides were characterized by PAGE, Mono Q- and reverse-phase HPLC. Chromatographic profiles showed marked differences between the monovariant macropeptides, attributable to differences in glycosylation. The B variant macropeptide was found to be more highly glycosylated than the A variant with an apparently greater number of oligo-saccharide chains per peptide unit and a higher level of sialylation. The analytical profiles for the mixed variant sample were a composite of those for the individual variants, all components being accounted for by one or other variant. It was concluded that while the overall extent of glycosylation may vary, there are consistent patterns of glycosylation for each variant.     

The effect of interstimulus interval on the discrimination of cryptic targets.

In 4 experiments, pigeons were required to discriminate between the presence and absence of cryptic targets. Experiments compared performance when 1 stimulus type appeared in a session (run condition) with performance when 2 types appeared intermixed (mixed condition). When the interstimulus interval (ISI) was short between successive presentations of the same stimulus, within-session improvements occurred in both run and mixed conditions (Experiments 1, 2, and 3). Experiment 4 showed that within-session improvements can occur as a result of mini-runs of 1 stimulus type followed by mini-runs of the other. These results suggest that several independent memory traces may be primed simultaneously and that performance is determined by the extent to which traces of stimuli have decayed by the time of their next presentation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of mercury on neurochemical receptors in wild river otters (Lontra canadensis)

Fish-eating wildlife, such as river otters (Lontra canadensis), accumulate mercury (Hg) at concentrations known to impair animal behavior, but few studies have explored the underlying biochemical changes that precede clinical neurotoxicity. The objective of this study was to determine if Hg exposure can be related to concentrations of neurochemical receptors in river otters. River otter carcasses (n = 66) were collected in Ontario and Nova Scotia (Canada) by local trappers in 2002-2004. Concentrations of Hg (total and organic) were measured in the cerebral cortex and cerebellum. Saturation binding curves for the cholinergic muscarinic acetylcholine (mACh) receptor and dopamine-2 (D2) receptor were completed for each animal to calculate receptor density (Bmax) and ligand affinity (Kd). Negative correlations were found between concentrations of Hg and mACh receptor Bmax (r(total) Hg = -0.458, r(inorganic) Hg = -0.454, r(organic) Hg = -0.443) in the cerebral cortex. A negative correlation was also found between concentrations of total Hg and D2 receptor Bmax (r = -0.292) in the cerebral cortex. These results suggest that neurochemical receptors may prove useful as novel biomarkers of Hg exposure and neurotoxic effects in wildlife. Given the importance of cholinergic and dopaminergic systems in animal physiology, the ecological implications of these changes need to be investigated.     

The impact of external facial features on the construction of facial composites

Witnesses may construct a composite face of a perpetrator using a computerised interface. Police practitioners guide witnesses through this unusual process, the goal being to produce an identifiable image. However, any changes a perpetrator makes to their external facial-features may interfere with this process. In Experiment 1, participants constructed a composite using a holistic interface one day after target encoding. Target faces were unaltered, or had altered external-features: (i) changed hair, (ii) external-features removed or (iii) naturally-concealed external-features (hair, ears, face-shape occluded by a hooded top). These manipulations produced composites with more error-prone internal-features: participants’ familiar with a target’s unaltered appearance less often provided a correct name. Experiment 2 applied external-feature alterations to composites of unaltered targets; although whole-face composites contained less error-prone internal-features, identification was impaired. Experiment 3 replicated negative effects of changing target hair on construction and tested a practical solution: selectively concealing hair and eyes improved identification.

Practitioner Summary: The research indicates that when a target identity disguises or changes hair, this can lead to a witness (or victim) constructing a composite that is less readily identified. We assess a practical method to overcome this forensic issue.

Abbreviation: GEE: Generalized Estimating Equations