Extended limits: A threat to small-scale fisheries     

Tony Loftas 《Marine Policy》1979,3(3):170

  相似文献   

North sea oil: Who leads whom?     

Tony Loftas 《Marine Policy》1977,1(3):178

  相似文献   

Editors' Foreword; Climate, Global Environmental Change and Health: International Scientific Assessments Begin to Roll     

Tony McMichael 《Global Change & Human Health》2001,2(1):3-4

Foreword

Editors' Foreword; Climate, Global Environmental Change and Health: International Scientific Assessments Begin to Roll  相似文献   

The BIMA Survey of Nearby Galaxies (BIMA SONG)     

Tamara T. Helfer  Michael W. Regan  Michele D. Thornley  Tony Wong  Kartik Sheth  Stuart N. Vogel  Douglas C.-J. Bock  LEO Blitz  Andy Harris 《Astrophysics and Space Science》2001,276(2-4):1131-1139

BIMA SONG is a systematic imaging study of the 3 mm CO J = 1 → 0molecular emission within the centres and discs of 44 nearby spiral galaxies on size scales of a few hundred parsecs (6-9"). The overall goal of the survey is to study the role of molecular gas in the evolution of spiral galaxies. To this end, BIMA SONG addresses 1) the distribution and physical conditions of the molecular gas in galactic discs and its relation to star formation, 2) the effects of a stellar bar on the kinematics of molecular gas, including the possible inflow of gas along a bar, and 3) the distribution and role of molecular gas in the central few hundred parsecs of active and quiescent galaxies. The source list includes all (except M33and M31) 44 galaxies of Hubble types Sa–Sd, with declinations δ >−20^°, visual magnitudes B < 11.0, velocities v _hel <2000 km s^-1, and inclinations i < 70^°. Beyond the specific scientific questions we will address, this survey will provide a unique database for astronomers who study galaxies at all wavelengths. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Using habitat suitability models for multiscale forensic geolocation analysis     

Haoyu Wang  Jennifer A. Miller  Tony H. Grubesic  Shalene Jha 《Transactions in GIS》2023,27(3):777-796

Pollen is one of the most durable environmental materials that law enforcement agencies recover as trace evidence from people and objects. Although links between objects and geographic locations are essential during legal investigations, the approach of using pollen and other microbial fingerprints to build these links in an analytical framework is still underutilized. This study uses bees as objects that are mobile and collects environmental traces as a test case to determine the efficacy of predictive geolocation efforts with recovered pollen and species distribution models at both subcontinental and global scales. Results demonstrate promising performance in both the predictive capability of species distribution models and identification of possible location history of bees at both study extents. When coupling pollen with other categories of evidentiary items, this geographic attribution framework can aid law enforcement personnel in refining investigation priorities and optimizing search strategies.  相似文献   

A Hybrid Geocoding Methodology for Spatio‐Temporal Data     

Alan T. Murray  Tony H. Grubesic  Ran Wei  Elizabeth A. Mack 《Transactions in GIS》2011,15(6):795-809

As tools for collecting data continue to evolve and improve, the information available for research is expanding rapidly. Increasingly, this information is of a spatio‐temporal nature, which enables tracking of phenomena through both space and time. Despite the increasing availability of spatio‐temporal data, however, the methods for processing and analyzing these data are lacking. Existing geocoding techniques are no exception. Geocoding enables the geographic location of people and events to be known and tracked. However, geocoded information is highly generalized and subject to various interpolation errors. In addition, geocoding for spatio‐temporal data is especially challenging because of the inherent dynamism of associated data. This article presents a methodology for geocoding spatio‐temporal data in ArcGIS that utilizes several additional supporting procedures to enhance spatial accuracy, including the use of supplementary land use information, aerial photographs and local knowledge. This hybrid methodology allows for the tracking of phenomenon through space and over time. It is also able to account for reporting inconsistencies, which is a common feature of spatio‐temporal data. The utility of this methodology is demonstrated using an application to spatio‐temporal address records for a highly mobile group of convicted felons in Hamilton County, Ohio.  相似文献   

GESE: a small UV space telescope to conduct a large spectroscopic survey of z∼1 Galaxies     

Sara R. Heap  Qian Gong  Tony Hull  Jeffrey Kruk  Lloyd Purves 《Astrophysics and Space Science》2014,354(1):211-214

One of the key goals of NASA’s astrophysics program is to answer the question: How did galaxies evolve into the spirals and elliptical galaxies that we see today? We describe a space mission concept called Galaxy Evolution Spectroscopic Explorer (GESE) to address this question by making a large spectroscopic survey of galaxies at a redshift, z～1 (look-back time of ～8 billion years). GESE is a 1.5-m space telescope with an ultraviolet (UV) multi-object slit spectrograph that can obtain spectra of hundreds of galaxies per exposure. The spectrograph covers the spectral range, 0.2–0.4 μm at a spectral resolving power, R～500. This observed spectral range corresponds to 0.1–0.2 μm as emitted by a galaxy at a redshift, z=1. The mission concept takes advantage of two new technological advances: (1) light-weighted, wide-field telescope mirrors, and (2) the Next-Generation MicroShutter Array (NG-MSA) to be used as a slit generator in the multi-object slit spectrograph.  相似文献   

    

Tony McMichael 《Global Change & Human Health》2002,3(1):3

  相似文献   

Topics. Pingos of Tuk     

Tony Waltham 《Geology Today》2003,19(6):212-215

  相似文献   

Gas Flows and Star Formation in the Ringed Galaxy NGC 4736     

Tony Wong  Leo Blitz 《Astrophysics and Space Science》2001,276(2-4):659-666

We present high-resolution (∼5″) BIMA CO observations of the ringed galaxy NGC 4736, along with previously published VLA HI data (Braun, 1995). Strong CO emission is detected from the star-forming ring at r=45″ and in the central region, where a molecular bar is apparent. The azimuthally averaged gas surface density is still much less than the Toomre critical density within r=60″, despite the starburst conditions in the ring (gas depletion time ≲1Gyr). Both CO and HI velocity fields show strong departures from a circular rotating disc model. The velocity residuals are consistent with inflowing gas near the ends of the central bar, outflowing gas between the bar and the ring, and inflowing gas outside the ring. We propose that the high star formation efficiency in the ring results from gas being driven out towards the OLR of the bar and in towards the ILR of the larger oval distortion. However, the strong signature of inflow outside the ring is probably due in part to gas motion in elliptical orbits. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献