This article presents an experimental investigation and statistical analysis of the effects cutting conditions on machining performance AISI 1045 steel using a wiper-shaped insert. Experimental findings are used to compare obtained wiper inserts with those conventional round-nose as recently reported in literature. In addition, process conditions, namely speed, feed rate, depth cut, analyzed or...

The ever growing demand for reducing costs and decreasing the time to market in today’s plastics industry makes rapid tooling prototyping a highly researched area. 3D printed injection mold inserts make it possible produce prototype parts small series fast cost-effectively. mechanical strength therefore life expectancy of polymeric are low compared their traditional steel counterparts. In order...

BACKGROUND In June 2012, Canada implemented new pictorial warnings on cigarette packages, along with package inserts with messages to promote response efficacy (i.e., perceived quitting benefits) and self-efficacy (i.e., confidence to quit). This study assessed smokers' attention toward warnings and inserts and its relationship with efficacy beliefs, risk perceptions and cessation at follow-up....

Most transposons display target site selectivity, inserting preferentially into sites that contain particular features. The bacterial transposon Tn7 possesses the unusual ability to recognize two different classes of target sites. Tn7 inserts into these classes of target sites through two transposition pathways mediated by different combinations of the five Tn7-encoded transposition proteins. I...

In this study, 3-D finite element modeling of precision hard turning has been used to investigate the effects of cutting edge microgeometry on tool forces, temperatures and stresses in machining of AISI H13 steel using polycrystalline cubic boron nitrite (PCBN) inserts with two distinct edge preparations. Hard turning experiments were conducted to investigate the effects of cutting edge geometr...

The "RapidTool" Short Run (SR) Tooling Process using the Copper Polyamide material provides a route to mold inserts for injection molding made directly in the Selective Laser Sintering machine. The STL files for the mold inserts are shelled and conformal cooling lines and ejector pin guides are added before SLS processing. Sintering of the material in the SLS machine provides quick metal/plasti...

Abstract In this work the over-time behaviour of a shell-and-tube type heat exchanger applied to commercial and small-scale wood biomass gasification system was investigated. The exchanger, equipped with twisted tape turbulators, used cool down syngas produced by power plant. An experimental campaign conducted evaluate performance trend in first 15 hours operation. results showed an increase tr...

Rescue operations in mountain areas, lasting many hours, pose a mental and physical burden on the rescuer’s body. In addition, they cause thermal discomfort associated with variable energy expenditures high variability of weather conditions. One solutions for improving comfort work rescuers is clothing an active heating function. This paper discusses technology manufacturing flexible inserts st...

BACKGROUND Minimally invasive direct thoracic interbody fusion (MIS-DTIF) is a new single surgeon procedure for fusion of the thoracic vertebrae below the scapula (T6/7) to the thoracolumbar junction. In this proof of concept study, we describe the surgical technique for MIS-DTIF and report our experience and the perioperative outcomes of the first four patients who underwent this procedure. ...

A heterogeneous design of mechanical metamaterial enables digital stiffness programmability. The prototype is composed an elastomer matrix containing diamond-shaped cavities that are selectively confined along their diagonals by semi-rigid plastic beam inserts. Unit-cell perturbations caused insert placement or removal reshape the global constitutive relation, whose lower and upper bounds corre...