Bio-electrospraying and aerodynamically assisted bio-jetting whole human blood: Interrogating cell surface marker integrity

Bio-electrospraying and aerodynamically assisted bio-jetting are two direct cell handling approaches recently pioneered, which have demonstrated significant applicability to the life sciences. These two bioprotocols have undergone scientific rigor, which have seen these techniques been explored in conjunction with a wide range of immortalized, primary and stem cells, and those whole organisms. Those studies have demonstrated a cellular population of >70% viable post-treatment in comparison with controls. Although, these studies assessed cellular viability, cell surface molecules play a critical role in several cellular functions, in particular, have importance to tissue engineering and regenerative medicine. Thus, in the studies reported herein, we demonstrate post-treated viable cells retain their cell surface marker expression levels in comparison to controls, over both short and long time points. Therefore, these studies further push back the frontiers of both bio-electrosprays and aerodynamically assisted bio-jetting in their endeavor as novel strategies for tissue engineering and regenerative biology∕medicine with possible targeted clinical utility.     

Towards a codification of practical knowledge

As practical knowledge seems to have a central place in organisational issues, we focus on possibilities of studying and formalising it. From an unusual theoretical perspective, we view practical knowledge as embodied knowing that is only manifest through action in a particular situation. Although this knowledge is largely implicit, we try to make what is articulable explicit. After highlighting the stakes involved in the codification of practices, we review the ontological and epistemological assumptions underlying the method developed. The method is founded on participant observation, a video recording of a situated subjective perspective and an ex post interview using this perspective to aid an actor in making part of his/her practical knowledge explicit. We present its implementation within research on polar expeditions in order to understand how an experienced actor deals with risks. In conclusion, we point out (1) the importance of this kind of data in knowledge management, (2) some lines of further research.     

Talkin' 'Bout Meta-Generation: ACT UP History and Queer Futurity

Modern Eloquence. Founded by Thomas B. Reed. New Edition by Ashley H. Thorndike. Modern Eloquence Corporation, New York, 1924. Twelve volumes.

The Psychology of Selling Life Insurance. By Edward K. Strong, Jr. Harper and Brothers, 1922. Pp. 489.

The Art of Talking, or Self‐Expression in Speech and Conversation. By W. Charles Loosmoore. London, John Murray. 1923.

A Complete Course in Public Speaking. By Joseph A. Mosher. Macmillan, New York, 1924. Pp. XXV + 174.

Writing By Types. By Albert C. Baugh, Paul C. Kitchen, and Matthew W. Black. The Century Co., New York, 1924.

The Dramatization of Bible Stories. By Elizabeth Erwin Miller. University of Chicago Press, 1918. Pp. 162.     

The effect of elevating the heels on spinal kinematics and kinetics during the back squat in trained and novice weight trainers

ABSTRACT

This research assessed the influence of various heel elevation conditions on spinal kinematic and kinetic data during loaded (25% and 50% of body weight) high-bar back squats. Ten novice (mass 67.6 ± 12.4 kg, height 1.73 ± 0.10 m) and ten regular weight trainers (mass 66.0 ± 10.7 kg, height 1.71 ± 0.09 m) completed eight repetitions at each load wearing conventional training shoes standing on the flat level floor (LF) and on an inclined board (EH). The regular weight training group performed an additional eight repetitions wearing weightlifting shoes (WS). Statistical parametric mapping (SPM1D) and repeated measures analysis of variance were used to assess differences in spinal curvature and kinetics across the shoe/floor conditions and loads. SPM1D analyses indicated that during the LF condition the novice weight trainers had greater moments around L4/L5 than the regular weight trainers during the last 20% of the lift (P < 0.05), with this difference becoming non-significant during the EH condition. This study indicates that from a perspective of spinal safety, it appears advantageous for novice weight trainers to perform back squats with their heels slightly elevated, while regular weight trainers appear to realize only limited benefits performing back squats with either EH or WS.     

9. GENERAL MEDIA

CONVERGENCE: INTEGRATING MEDIA, INFORMATION &; COMMUNICATION by Thomas F. Baldwin, D. Stevens McVoy, and Charles Steinfield (Thousand Oaks, CA: Sage Publications, 1996—$48.00/$22.00, ISBN 0–8039–5904–4 hard, ISBN 0–8039–5905–2 paper, 430 pp., figures, notes, index)

PLUNKETT'S INFOTECH INDUSTRY ALMANAC: THE ONLY COMPLETE GUIDE TO THE TECHNOLOGY AND THE COMPANIES THAT ARE CHANGING THE WAY THE WORLD THINKS, WORKS AND COMMUNICATES by Jack W. Plunkett (Galveston, TX: Plunkett Research, 1996—$125.00, paper, ISBN 0–96382–682–4, 697 pp.)

COMMUNICATION SATELLITES: 1958–1995 by Donald H. Martin (Aerospace Press [PO Box 80966, Los Angeles, CA 90080–0966], 1996 [3rd ed.]— $35.00, paper, ISBN 1–884989–02–0, 484 pp., diagrams, tables, maps, glossary, bibliography)

SATELLITE TECHNOLOGY: AN INTRODUCTION by Andrew F. Inglis and Arch C. Luther (Woburn, MA: Focal Press, 1997 [2nd ed.]—$24.95, paper, ISBN 0–240–80295–0, 134 pp., diagrams, tables, appendices, glossary, bibliography, index)

COMMUNICATIONS TECHNOLOGY HANDBOOK by Geoff Lewis (Woburn, MA: Focal Press, 1997 [2nd ed.]—$79.95, ISBN 0–2405–1461–0, 467 pp., diagrams, tables, appendices, index)     

6. FOREIGN AND INTERNATIONAL

TELECOM REFORM: PRINCIPLES, POLICIES AND REGULATORY PRACTICES by edited by William H. Melody (Lyngby, Denmark: Den private Ingeniørfond, Technical University of Denmark, 1997‐$39.00, paper, ISBN 7–7381–071–1, 557 pp., tables figures notes, index, glossary, appendix)

RADIO CANADA INTERNATIONAL: VOICE OF A MIDDLE POWER by James L. Hall (East Lansing: Michigan State University Press, “Canadian Series No. 7,”; 1997—$24.95, paper, ISBN 0–87013–420–5, 295 pp., photos, notes, appendices, bibliography, index)

BITS ACROSS BORDERS: POLICY CHOICES FOR INTERNATIONAL MULTIMEDIA AND DIGITAL SERVICES: A Report of the Second Annual Aspen Institute Roundtable on International Telecommunications, Berlin, Germany, June 19–22, 1996, by Kenneth G. Robinson and Charles M. Firestone (Queenstown, MD: The Aspen Institute, 1997—$10.00, ISBN 0–89843–208–1, 55 pp., appendix)

IT'S A WIRED WORLD by Anne C. Leer (Oslo: Scandinavian University Press [Universitetsforlaget], 1996—L27.50, ISBN 82–00–42310–7, 188 pp., figures, appendices, notes, glossary)

THE POLITICAL ECONOMY OF COMMUNICATION: RETHINKING AND RENEWAL by Vincent Mosco (Thousand Oaks, CA: Sage Publications, 1996—$39.95/13.95, ISBN 0–8039–8560–6 hard, 0–8039–8561–4 paper, 320 pp., figures, tables, notes, index)

EBU YEARBOOK 1997 (Geneva: European Broadcasting Union, 1997—free by contacting the EBU, no ISSN given, 52 pp., tables, charts, photos)

LIVE, DIRECT AND BIASED? MAKING TELEVISION NEWS IN THE SATELLITE AGE by Brent MacGregor (London: Arnold/New York: St. Martin's Press, 1997—prices not given, ISBN 0–340–66224–7 hard, 0–340–66225–5 paper, 234 pp., table, references, index)

GLOBAL INFORMATION AND WORLD COMMUNICATION: NEW FRONTIERS IN INTERNATIONAL RELATIONS by Hamid Mowlana (London: Sage, 1997 [2nd ed.] $29.95, ISBN 0–7619–5256‐X hard, ISBN 0–7619–5257–8 soft, 270 pp., figures, selected bibliography, index)     

Hydrodynamic characteristics of sea kayak traditional paddles

We present a study of the hydrodynamic characteristics of sea kayak paddles without taking into account the kayaker. We focus on traditional paddles used in the Arctic, one from Greenland and one from the Aleutian Islands. A basic modern European paddle is included in the study for comparison. First the paddle stroke parameters specific to sea kayaking are identified because previous studies were devoted to a competition context. The hydrodynamic force generated by the blade motion is detailed: two terms are identified, one involving the inertia of the water surrounding the blade at the beginning of its motion, and the second term is the classical drag/lift force. Drag and lift force coefficients were measured in a wind tunnel. The data allow computation of the hydrodynamic force during a paddle stroke. The European paddle was shown to be more efficient than the traditional paddles because of its shorter length to width ratio which contributed to a larger inertia effect. However, the force obtained with the traditional paddles better follows the imposed motion by the kayaker so that they are more comfortable and less tiring in the context of long distance trips, as those practiced in sea kayaking.