Experimental Wear Modelling of Lifeboat Slipway Launches

It is necessary to use an inclined slipway to launch lifeboats in locations where there is no natural harbour. Slipway stations consist of an initial roller section followed by an inclined keelway, the lifeboat is released from the top of the slipway and proceeds under its own weight into the water. Contact is between the lifeboat keel and a lined, greased keelway and this that determines the friction along the slipway. This paper describes a bench test methodology to investigate this contact. The selection of a modified TE57 reciprocating tribometer and design of a modified pin on plate arrangement is discussed. A test schedule for both the original nickel/chromium coated steel lining and the new low-friction jute fibre/phenolic resin composite lining is developed to accurately reflect real world conditions including environmental contamination such as seawater or wind-blown sand. Environmentally conscious lubricants including water and bio-greases are investigated and compared for their effects in reducing slipway panel friction and wear. Experimental data is collected to establish wear mechanisms, wear volumes and friction characteristics for a range of lubricants and environmental contaminants for the two most common lifeboat keelway lining materials. Implications of this research for future lifeboat slipway design are discussed

Magnetic Interactions for the Electronic Configuration d5

Applying Horie's method, the matrix elements of spin—other‐orbit interaction for configuration d5 have been calculated. The magnetic interaction energy has also been calculated for Mn++ by means of perturbation theory. It is found that spin—other‐orbit interaction plays a very important role for atoms or ions with half‐filled‐shell configuration. Spin—spin interaction is also significant in certain terms.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/70776/2/JCPSA6-46-8-2907-1.pd

Rotational analysis of the 7000 Å (A 3Φ→X 3Δ) electronic emission system of diatomic vanadium mononitride (VN)

The (0,0) band of the electronic emission system of the diatomic molecule VN at ∼7000 Å has been generated and rotationally analyzed. The system is 3 Φr →3 Δr and is the vanadium analog of the niobium nitride system centered ∼6029 Å. The constants for the upper and lower (almost certainly the ground) states have been determined, including estimates of the spin–orbit coupling constants, despite the absence of satellite bands. The subband origins are somewhat asymmetrically located, probably due to the interaction of the 3 Δ2 and the higher lying (by ∼3000 cm−1 ) 1 Δ2 state. There is no evidence of localized perturbations in any of the subbands. VN has the shortest bond length (r0 =1.566 Å ) observed for any diatomic molecule containing a transition metal (apart from some hydrides). The (1,1) sequence bands have also been observed but have not been rotationally analyzed at this time.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/70667/2/JCPSA6-90-10-5333-1.pd

Hyperfine structure in the red emission system of NbN

A detailed study of hyperfine structure observed in the 0,0 band of the 3Φ (aβ) →3Δ (aβ) system of NbN has shown that the secondary hyperfine effects observed in this structure are not due to a perturbation in the 3Δ state but rather to the presence of a nonnegligible hyperfine effect in the 3Φ excited state. Calculations of the intensity factors corresponding to the observed transitions confirm this hypothesis and give results in excellent agreement with experiment.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/69362/2/JCPSA6-63-7-2861-1.pd

Male Genital Self-Mutilation with Maggot Infestation in an Intoxicated Individual

We present the case of a 55-year-old homeless male who presented with penis and scrotal maggot infestation secondary to genital self-mutilation. The patient gave a history consistent with gender identity disorder and indicated that he was intoxicated during the event. The patient had no history of psychosis. He sought medical attention only after he was no longer welcome on public transportation due to the odor emanating from this infection. Untreated gender identity disorder with alcohol dependence in this case led to a drastic behavior with significant consequences

Neuronal activation for semantically reversible sentences

Semantically reversible sentences are prone to misinterpretation and take longer for typically developing children and adults to comprehend; they are also particularly problematic for those with language difficulties such as aphasia or Specific Language Impairment. In our study, we used fMRI to compare the processing of semantically reversible and nonreversible sentences in 41 healthy participants to identify how semantic reversibility influences neuronal activation. By including several linguistic and nonlinguistic conditions within our paradigm, we were also able to test whether the processing of semantically reversible sentences places additional load on sentence-specific processing, such as syntactic processing and syntactic-semantic integration, or on phonological working memory. Our results identified increased activation for reversible sentences in a region on the left temporal–parietal boundary, which was also activated when the same group of participants carried out an articulation task which involved saying “one, three” repeatedly. We conclude that the processing of semantically reversible sentences places additional demands on the subarticulation component of phonological working memory

Spin forbidden bands in Cr III hexamine

A large deuterium isotope effect has been found in the spin forbidden bands of the chromium III hexamine complex. The significance of this is discussed.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/32061/1/0000105.pd