abstract purpose-the purpose of this paper is to review a sample of the literature relating to interpretive structural modelling (ism) and its deployment for modelling purposes in the area of supply chain management (scm). design/methodology/approach- the literature is examined from the three perspectives. first, concept of ism and examines ism as modelling technique. second, use of ism by the ...

We have made continuum and spectral line observations of several outflow sources in the Mon OB1 dark cloud (NGC 2264) using the Heinrich Hertz Telescope (HHT) and ARO 12m millimeter-wave telescope. This study explores the kinematics and outflow energetics of the young stellar systems observed and assesses the impact star formation is having on the surrounding cloud environment. Our data set inc...

We propose a simple theoretical model for star formation in which the local star formation rate in a galaxy is determined by three factors. First, the interplay between the interstellar radiation field and molecular self-shielding determines what fraction of the gas is in molecular form and thus eligible to form stars. Second, internal feedback determines the properties of the molecular clouds ...

We report the spectrum of Orion-BN/KL between 5.3 and 7.2 mm observed with the Short Wavelength Spectrometer (SWS) on board the Infrared Space Observatory. H2O lines of the –0 bending mode with l ! n 5 1 2 6.3 mm (the R-branch) are observed in absorption, while lines with l 1 6.3 mm (the P-branch) are observed in emission. Radiative transfer models including the (0, 0, 0), (0, 1, 0), and (0, 0,...

Millimeter observations of preand protostellar cores show that the abundances of the gas-phase tracer molecules, CO and N2H , anticorrelate with each other and often exhibit “holes” where the density is greatest. These results are reasonably reproduced by astrochemical models, provided that the ratio between the binding energies of N2 and CO, , is taken to be between 0.5 and 0.75. This Letter i...

We have examined the relationship between the optical depth of the 9.7 mm silicate absorption feature ( ) t9.7 and the near-infrared color excess, , in the Serpens, Taurus, IC 5146, Chameleon I, Barnard 59, and E(J K ) s Barnard 68 dense clouds/cores. Our data set, based largely on Spitzer IRS spectra, spans E(J K ) p 0.3–10 s mag (corresponding to visual extinction between about 2 and 60 mag)....

The bipolar outflow from the massive star forming cluster in DR21 is one of the most powerful known, and in IRAC images the outflow stands out by virtue of its brightness at 4.5 μm (Band 2). Indeed, IRAC images of many galactic and extragalactic star formation regions feature prominent Band 2 morphologies. We have analyzed archival ISOSWS spectra of the DR21 outflow, and compare them to updated...

Using the ASTE 10 m submillimeter telescope and the 1.4 m Infrared Survey Facility (IRSF), we performed an extensive outflow survey in the Orion Molecular Cloud -2 and -3 region. Our survey, which includes 41 potential star-forming sites, has been newly compiled using multi-wavelength data based on millimeterand submillimeter-continuum observations as well as radio continuum observations. From ...

The reactions of ground-state atomic carbon with acetylene, (1), methylacetylene, (2), 22 3 ethylene, (3), and propylene, (4), are investigated at relative collision energies between 8.8 24 36 and 45 kJ mol~1 in crossed-beam experiments to elucidate the reaction products and chemical dynamics of atom-neutral encounters relevant to the formation of carbon-bearing molecules in the interstellar me...

We report the detection of the H2O molecule in absorption at a redshift z=0.68466 in front of the gravitationally lensed quasar B0218+357. We detect the fundamental transition of ortho–water at 556.93GHz (redshifted to 330.59GHz). The line is highly optically thick and relatively wide (15 km/s FWHM), with a profile that is similar to that of the previously detected CO(2–1) and HCO(2–1) opticall...