On the mechanical properties of N-functionalised dipeptide gels

The properties of a hydrogel are controlled by the underlying network that immobilizes the solvent. For gels formed by the self-assembly of a small molecule, it is common to show the primary fibres that entangle to form the network by microscopy, but it is difficult to access information about the network. One approach to understand the network is to examine the effect of the concentration on the rheological properties, such that G cx, where G is the storage modulus and c is the concentration. A number of reports link the exponent x to a specific type of network. Here, we discuss a small library of gels formed using functionalized dipeptides, and describe the underlying networks of these gels, using microscopy, small angle scattering and rheology. We show that apparently different networks can give very similar values of x

Correlates of Post-traumatic Growth Following a Myocardial Infarction: A Systematic Review

Correlates of post-traumatic growth (PTG) have been examined in the area of health psychology previously, with much focus on aspects of personality, coping, and social support. This systematic review aimed to examine correlates of PTG for those who have experienced a myocardial infarction (MI). Studies which met inclusion criteria were assessed for quality and reviewed. Results showed an inconsistent strength of associations between studies and so conclusions cannot be drawn. Possible reasons for these differences are discussed and recommendations for future research are suggested

Problem-based Learning in Institutional and Curricular Design at the New Model Institute for Technology and Engineering (NMITE)

NMITE’s Master’s in Integrated Engineering (MEng) was created with a unique philosophy of integrating not only traditionally separate strands of engineering, but also of integrating engineering with other disciplines such as arts, humanities, and business. This broad and deep integration is made possible by adopting the principles and practices of problem-based learning (PBL) and embedding them within predetermined module challenges. In this way, each PBL challenge highlights and hones areas of engineering expertise and embeds liberal subjects whilst maintaining the integration intrinsic to the programme. Overall, this method supports the use of block learning with deep integration of employers and the community in the educational experience

Leaky mode analysis of luminescent thin films: the case of ZnO on sapphire

Zinc oxide (ZnO) epitaxial thin films grown on c-sapphire substrates by pulsed laser deposition were investigated using angle and polarization-resolved photoluminescence spectroscopy. Side-emission spectra differed significantly from surface-emission spectra in exhibiting dominant, narrow, polarization-resolved peaks. These spectral features were attributed to leaky substrate modes in the layers. Observations were first verified using transmission calculations with non-adjustable parameters, which took into account the dispersion, the anisotropy of the ZnO refractive index and the dependence on film thickness. Results were consistent with Fabry-Perot-like interference being the origin of the distinctive ZnO luminescence observed at grazing incidence angles. A second analysis, based on the source terms method, was used in order to retrieve the bulk emission properties, including the wavelength-dependent quantum yield and the emission anisotropy. While ZnO thin films were considered here, this analysis method can be extended to any luminescent thin film of similar geometry, demonstrating the potential of leaky mode analysis for probing passive and active material properties

Design development and performance evaluation of ICE exhaust silencer

The noise levels generated by an unmuffled engine exhaust system can be identified as the loudest vehicle noise source. The muffler or silencer is an essential component of the internal combustion engine exhaust system, its main function is to reduce the exhaust-generated noise to an acceptably low level. Its design development is a complex process affecting the engine efficiency and thusfuel consumption, emissions and overall noise generation. This paper focuses on the design development of a muffler for a single cylinder engine application. A 1D GT-Power model of a single valve engine was developed. Additionally, an analytical muffler preliminary design methodology was introduced. The methodology provides guidelines for muffler grade selection, sizing of different components, calculation of back pressure as a function of the exhaust gas flow rate. Two custom mufflers design concepts were developed for the single cylinder engine based on the introduced analytical methodology. Two commercial single cylinder engine muffler designs available from Yanmar and Loncin were considered for the engine performance evaluation simulation. The presented combination of analytical and numerical modelling procedures can reduce the overall length of the muffler development stage by eliminating faulty design concepts and refining the muffler’s performance parameters

Prospectus, May 10, 1977

COLLEGE CENTER: SONGWRITER KRISTIN LEMS TO PERFORM; Activities Day set for Wed.; Instructors accept proposed contracts; Teplitz shows how to relax; Run-off vote elects Zettler Stu-Gov. pres.; \u27Don\u27t get no respect\u27: Letters to the ed: Stoeber drops some names, Schultz gives a hearty thanx, Tuesday spent buried in paper, Alexander bids farewell to all; PC President lauds paper; And finally...; Thornton \u27Courier\u27 contest: Paper wins awards; PC offers insurance for \u2777-\u2778 year; News: Top \u2776-\u2777 stories remembered in pictures; Police Chief Dye: 35,000 calls - from fights to barking dogs; Micro Tech: Little ol\u27 watchmakers aren\u27t so old; Local artist: Art sale to feature allegorical folk art; Quad ceremony: Commemoration reminds of Kent State; Events: Nadia, carnival highlight this year\u27s student activities; Classifieds; Final exam schedule listed for spring sem.; Sports: Highlighted by women\u27s basketball; PC Intramural Program wants more students; \u27The David Kopay Story\u27 brings everything out: A review; 3-hitter helped: Women\u27s softball team take 3rd place; Two Cobras to Texas, finish seventh in state; Parkland goes for 30 wins; Parkland builds future: Urbana donates third, fourth recruitshttps://spark.parkland.edu/prospectus_1977/1016/thumbnail.jp