Structured polyurethanes for oil uptake

In an attempt to develop a desirable resin formulation for spilled oil absorption, segmented polyurethanes of various types and lengths of hard and soft segments have been synthesized and tested for X‐ray diffraction, thermal, mechanical, and dynamic mechanical properties in addition to oil and water absorptions. Significant oil absorption was obtained with ether type polyol of high molecular weight, especially with short hard segments of long‐chain diamines. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 2080–2087, 2005     

Coding of temporal order information: An automatic process?

This article includes four experiments in which four criteria for testing the automaticity of coding of temporal order information are examined. Results show that memory for temporal order information is affected by intention to learn, competing task loads, encoding strategy, and subjects' age. The results, which generally hold for memory for absolute, as well as for relative temporal order information, do clarify the somewhat mixed pattern of results in previous studies, which was due, at least in part, to inappropriate testing methodologies. Such results, which are similar to recent tests of automaticity of frequency of occurrence and spatial location information, are at odds with the claim made by several researchers that memory for temporal order information is exclusively mediated by automatic processes. The concept of automaticity and the appropriateness of the testing criteria for it are discussed in light of the current results. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The structure and electro‐mechanical properties of novel hybrid CNT/PANI nanocomposites

Electrically conductive elastomeric nanocomposites containing carbon nanotubes (CNT) and polyaniline (PANI) are reported in the present investigation. The synthesis procedure included an in situ inverse emulsion polymerization of aniline doped with dodecylbenzene sulfonic acid (DBSA) in the presence of CNT and dissolved styrene‐isoprene‐styrene (SIS) block copolymer. The PANI synthesis step was carried out by applying ultrasonic energy. The dispersions obtained were processed by two methods: a recently developed precipitation‐filtration procedure, and a conventional drop‐cast procedure. The techniques developed resulted in homogeneous exfoliated PANI coated nanotubes within the elastomeric matrix. The presence of CNT/PANI in the SIS elastomeric matrix affects thermal, mechanical, and electrical properties of the nanocomposites. The formation of continuous three‐dimensional CNT/PANI networks prepared via the precipitation‐filtration method enhances the nanocomposite properties. Contrarily, the intermittent three‐dimensional network prepared by conventional drop‐cast method leads to inferior properties. Nanocomposites produced by both techniques are observed by HRSEM. The two processing techniques result in different structures, which affect the physical properties of the materials produced. A relatively low percolation threshold for both methods was determined. The Young's modulus of the SIS/CNT/PANI significantly increased in the presence of CNT. The precipitation‐filtration technique yields an improved nanocomposite product compared to the drop‐cast route. POLYM. COMPOS., 35:788–794, 2014. © 2013 Society of Plastics Engineers     

Screen time: Clinical notes regarding Meissner's (2006) chronically late patient.

This communication is a commentary on William W. Meissner's presentation (see record 2006-20697-003) of a patient who chronically came late for sessions. The time duration of analytic work-relatively restricted per hour yet potentially limitless in overall duration-represents an existential paradox that is fundamental to the basic representational qualities of mental experience, and inherent in a mute way in the analytic frame. It is to be expected that the latent temporal elements of the patient's conflicts will inevitably challenge this aspect of the frame, subtly coercing patient and analyst to recreate these novel dimensions. If the analyst is too cautious regarding the inevitability of countertransference reactions to such a patient, important developmental opportunities may be missed. I suspect that the chronic lateness and absence that characterized the work with this patient screened an early, nonmentalized trauma that had torn a hole in the foundations of the patient's sense of time, and was inadvertently expressed by Meissner in an entirely atypical manner. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

On some questions regarding k -regular and k -context-free sequences

We answer two questions of Allouche and Shallit regarding k-regular sequences and k-context-free sequences. One of these has been solved independently in another way by Bell. We also provide a partial solution to another question of Allouche and Shallit regarding the subword complexity of k-context-free sequences.     

Transversal moving-front patterns: Criteria and simulations for two-bed and cylindrical shell packed-bed reactors

We show that a moving-front solution in a cylindrical shell packed-bed catalyzing a first-order activated reaction may bifurcate into transversal patterns when Pe_C/Pe_T<ΔT_ad/ΔT_m, i.e. when the ratio of the mass to heat Pe numbers is smaller than the ratio of the adiabatic to maximal temperature rises. This coincides with the previous condition of transversal patterns to emerge in stationary fronts [Pe_C/Pe_T<1 [Viswanathan, G., Bindal, A., Khinast, J., Luss, D., 2005. Stationary transversal hot zones in adiabatic packed-bed reactors. A.I.Ch.E. Journal 51, 3028-3038]] and extends the bifurcations condition to the case of moving fronts. The novel condition cannot be satisfied in a downstream propagating front (ΔT_m/ΔT_ad>1), but for an upstream propagating front (toward the cold reactor inlet) ΔT_m/ΔT_ad<1 and the symmetry breaking can be obtained within a feasible domain of operating conditions (Pe_C/Pe_T>1). It was also assumed that the axial and the transversal Pe numbers vary consistently, i.e. κ_C=Pe_C⊥/Pe_C=κ_T=Pe_T⊥/Pe_T. A similar condition was also obtained using a simplified model composed of two 1-D beds with heat and mass exchange between them.Bifurcation diagram showing domains of transversal patterns is constructed using a learning two-bed model. These predictions are verified by direct numerical simulations of the continuous 2-D cylindrical shell model showing various types of moving transversal patterns within a feasible domain of the state parameters with Pe_C>Pe_T. In the case of varying ratio (κ_C≠κ_T) the pattern domain can be significantly extended toward larger Pe_C/Pe_T.     

Cutting-tool management in computer-integrated manufacturing

The problem of cutting tool management has been brought to the forefront with the emergence of computer-integrated manufacturing (CIM) and, in particular, flexible manufacturing systems (FMSs). The financial and operational ramifications of effective tool management has spurred considerable research in this area during the past decade and many researchers are proposing sound solutions to various facets of this broad-ranging and difficult problem. This paper identifies critical areas of research for the development of tool management systems in CIM. To develop a framework for this, the paper examines and categorizes work in academia and in industry on the management of cutting-tools in CIM and describes some key implementations, particularly in the metal-cutting industry. The solution of manufacturing problems generally demands an eclectic approach, and for this reason, we have tried to taxonomize, describe, and critique the various research thrusts in an attempt to provide a synthesis of use in more unified approaches.     

Cultural techniques in psychotherapy: A case in point.

Describes an incident in which a Bedouin 8th grader in Israel killed a classmate. The author describes how he applied S. Sue and N. Zane's (see record 1987-16319-001) interpretations of cross-cultural therapy research, which emphasize credibility and giving, to this situation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)