Broad Range Of Colors Research Articles

Combinatorial approach to organelle-targeted fluorescent library based on the styryl scaffold.

The first fluorescent styryl dye library with a broad color range was synthesized by combinatorial condensation of various aldehydes and methyl pyridinium compounds, and their applications as organelle specific staining probes were demonstrated.

The LBDS Hercules sample of mJy radio sources at 1.4 GHz -- I. Multicolour photometry

The results are presented of an extensive programme of optical and infrared imaging of radio sources in a complete subsample of the Leiden–Berkeley Deep Survey. The LBDS Hercules sample consists of 72 sources observed at 1.4 GHz, with flux densities S1.41.0 mJy, in a 1.2 deg2 region of Hercules. This sample is almost completely identified in the g, r, i and K bands, with some additional data available at J and H. The magnitude distributions peak at r≃22 mag, K≃16 mag and extend down to r≃26 mag, K≃21 mag. The K-band magnitude distributions for the radio galaxies and quasars are compared with those of other radio surveys. At S1.4 GHz≲1 Jy, the K-band distribution does not change significantly with radio flux density. The sources span a broad range of colours, with several being extremely red (r−K≳6). Though small, this is the most optically complete sample of mJy radio sources available at 1.4 GHz, and is ideally suited for studying the evolution of the radio luminosity function out to high redshifts.

Simulation Modeling of the Textile Supply Chain. Part I: The Textile-plant Models

In Part I of the series, we describe stochastic computer models that simulate operations in the spinning, knitting, weaving, dyeing and finishing, and cut/sew sectors of the textile industry. The models are scaled to represent a supply chain designed to feed a garment-manufacturing operation involving four or five plants, i.e. part of each plant's output is ‘dedicated’ while simultaneously providing yarns and fabrics to the industry at large. Each of the sector models is unique because of the very different types of processing technology employed. The models are linked by means of streams of fabric orders from the manufacturing plants that make a range of garment types requiring many different fabrics for Basic (year-round sales), Seasonal (two or three seasons per year), and Fashion (shelf lives of 8–12 weeks) goods in a broad range of colors. In addition to each plant's product ranges and order sizes and frequencies, particular attention is paid to the machine-scheduling algorithms, although the models are deliberately kept at a ‘high’ as opposed to a ‘shop-floor’ level. The purpose of this modeling is to allow senior management to answer broad questions about the plants' ability to operate in a Quick Response environment. The various model outputs reflect this, having a heavy emphasis on on-time shipments, back-order levels, and service levels. In Part II of the series, we shall present the QR-related operating results to date, a description of a master-scheduling procedure to orchestrate the operations of the supply chain, ideas on an improved scheduling method, and an account of the construction of neural-network decision surface models as a decision support tool. We also overview ongoing efforts in technology transfer and in using ‘fuzzy’ mathematics to model the vagueness and uncertainty inherent in the supply- chain decision-making environment. The research effort of which this is a part is ongoing. We present these results in the hope of encouraging others to help carry the investigations forward.

COMPOSITION AND EVOLUTION PATTERNS IN THE OLD OPEN CLUSTER MELOTTE 66: PHOTOELECTRIC (U)BV(RI) PHOTOMETRY OF 71 STARS

ABSTRACT New photoelectirc (U)BV(RI) data for 71 red giants and turnoff stars in the old open cluster Melotte 66 are presented and discussed. The photometry confirms the broad color range exhibited by giants at and above the level of the clump. UBV analysis of turnoff stars yields [Fe/H]= -53 ± 0.08 assuming a cluster of E(B-V) = 0.16 ± 0.02. A nearly identical [Fe/H] is implied by the giants' ultraviolet excesses, but with a significantly higher dispersion. Previously published CCD uby data has been transformed to the BV system to permit an analysis of the cluster color-magnitude diagram with reference to isochrones which incorporate convective core overshoot. Main sequence fits imply an age of 4.5 ± 0.5 Gyr and an apparent modulus (m-M) = 13.75. Further support for these reddening and distance values is provided by comparison of the red giant clump to other old open clusters. The giant branch of Mel 66 is shown to extend to an extreme in both luminosity and color currently matched only by old open cluster NGC 6791 and Cr 261.