Physical Sciences and Mathematics Commons^™

ข่าวและกิจกรรมสิ่งแวดล้อม

Thai Environment

No abstract provided.

เทคโนโลยีสะอาด, วรรณา จินดาศรี

Thai Environment

No abstract provided.

ประเทศไทย : มาตรการขนส่งสารเคมีและวัตถุอันตราย, วรรณี พฤฒิถาวร

Thai Environment

No abstract provided.

Underground Coal Gasification 2000, University Of North Dakota. Energy And Environmental Research Center

EERC Brochures and Fact Sheets

Fact sheet on underground coal gasification, its benefits, and the Energy & Environmental Research Center's research on the topic. [This item is an outdated or superseded version and retained for historical purposes only. It may no longer reflect current information, policies, or practices.]

Red River Water Management Consortium, University Of North Dakota. Energy And Environmental Research Center

EERC Brochures and Fact Sheets

Brochure describing the Red River Water Management Consortium, developed by the Energy & Environmental Research Center and other area stakeholders. Outlines the program's purpose and current members; also lists previous and current activities. [This item is an outdated or superseded version and retained for historical purposes only. It may no longer reflect current information, policies, or practices.]

Organic Vegetables : A Guide To Production, Steven Mccoy

Bulletins 4000 -

There appears to be considerable opportunity for the development of organic vegetable production in Western Australia for either fresh or processed product. While a number of growers are successfully producing relatively small quantities of organic vegetables for both domestic and export markets, few large scale commercial growers have sought to capitalise on this opportunity.

Consumer interest in organically grown vegetables has increased rapidly in recent years due largely to concerns relating to food safety, health and the environment. For more information on markets for organic vegetables refer to AGWEST publication “Market Prospects – Organic Carrots and other Vegetables”.

Solar: Towards A Flexible And Scalable Data-Fusion Infrastructure For Ubiquitous Computing, Guanling Chen, David Kotz

Dartmouth Scholarship

As we embed more computers into our daily environment, ubiquitous computing promises to make them less noticeable and to avoid information overload. We see, however, few ubiquitous applications that are able to adapt to the dynamics of user, physical, and computational context. The challenge is to allow applications flexible access to these sources, and yet scale to thousands of devices and sensors. In this paper we introduce our proposed infrastructure, Solar. In Solar, information sources produce events. Applications may subscribe to interesting sources directly, or they may instantiate and subscribe to a tree of operators that filter, transform, merge and …

Application Performance On The Cross/ Linux Software Programmable Router, Prem Gopalan, Seung Chul Han, David K.Y. Yau, Xuxian Jiang, Puneet Zaroo

Department of Computer Science Technical Reports

No abstract provided.

Minimizing Latency And Jitter For Large Scale Multimedia Repositories Through Prefix Caching, Sunil Prabhakar, Rahul Chari

Department of Computer Science Technical Reports

No abstract provided.

On Clustering And Retrieval Of Video Shots, Chong-Wah Ngo, Ting-Chuen Pong, Hong-Jiang Zhang

Research Collection School Of Computing and Information Systems

Clustering of video data is an important issue in video abstraction, browsing and retrieval. In this paper, we propose a two-level hierarchical clustering approach by aggregating shots with similar motion and color features. Motion features are computed directly from 20 tensor histograms, while color features are represented by 30 color histograms. Cluster validity analysis is further applied to automatically determine the number of clusters at each level. Video retrieval can then be done directly based on the result of clustering. The proposed approach is found to be useful particularly for sports games, where motion and color are important visual cues …

A Statistical Study Of Transient Event Motion At Geosynchronous Orbit, Jeff Sanny, David Berube, D. G. Sibeck

Physics Faculty Works

The geosynchronous GOES 5 and GOES 6 satellites frequently observe transient events marked by magnetic field strength increases and bipolar magnetic field signatures lasting several minutes. In this study we report a survey of 87 events observed simultaneously by both GOES spacecraft (for a total of 174 individual observations) from August to December 1984. Events detected in the prenoon sector outnumbered those in the postnoon sector by about a 3 to 1 ratio. The distribution of the events versus local time exhibited a significant prenoon peak like the distribution of magnetic impulse events observed in high-latitude ground magnetometers. A cross-correlation …

A Preliminary Survey Of The Sewage Pumpout Facilities In The No Discharge Areas Of Massachusetts, Urban Harbors Institute, University Of Massachusetts Boston

Urban Harbors Institute Publications

This survey provides a preliminary review of the activities of pumpout facilities in the No Discharge Areas of Massachusetts. It highlights areas of concern, identifies potential improvements and focuses further research.

Based on data from Massachusetts Coastal Zone Management, there are 100 pumpout facilities in Massachusetts, located in 56 towns. Of these 52, have one or more pumpout boats. Due to financial limitations and the time available, any attempt to survey all these facilities was beyond the scope of this study. However, it had been suggested that from CZM’s, DMF’s and EPA’s standpoint, the areas of greatest interest were those …

Weed Plan For Western Australia, State Weed Plan Steering Group, Department Of Agriculture And Food, Western Australia

Bulletins 4000 -

One of the most significant environmental challenges facing Western Australia is the minimisation of the impact of weeds. In the relatively short history of this State since European settlement, some 1155 exotic plant species have established as weeds in our diverse and generally fragile ecosystems. While development for agriculture, mining, transport and housing must by its nature result in some change to the State’s flora, the introduction of weedy plant species has caused serious impacts which cause great concern.

Weeds now pose a serious threat to many of the State’s ecosystems, and impose high annual costs on agricultural industries. Weeds …

Island Arcs, Accretionary Terranes And Midcontinent Structure New Understandings Of The Geologic Architecture Of The U.S. Midcontinent, Marvin P. Carlson

Conservation and Survey Division: Faculty and Staff Publications

A data base collected over the last 100 years, containing both surface and subsurface information, has allowed us to begin to understand the physical framework of Nebraska. We have learned that even in the stable Midcontinent region of North America, there has been an active geologic history. This framework has been deciphered by our programs of surface geologic mapping and by the study of rock samples from both water wells and those deeper test wells for oil and gas. Determining the major structural features across the state (figure 1) has allowed us to better understand both the occurrences of its …

Energetics And Cooperativity In Three-Center Hydrogen Bonding Interactions. Ii. Intramolecular Hydrogen Bonding Systems, Ruben D. Parra, Bing Gong, Xiao Cheng Zeng

Xiao Cheng Zeng Publications

High level ab initio calculations have been carried out on a number of intramolecular two- and three-center H-bonding structures containing the amide motif, NHC=O. These structures serve as model systems for probing the stability of intramolecular three-center H bonds of the type A₁HA₂. Particular attention is given to cooperative effects in the three-center H-bonding structures. A systematic assessment of cooperativity for intramolecular H-bonding systems is presented.

Efficacy Of Wolfin To Repel Black-Tailed Deer, Dale L. Nolte, Kimberly K. Wagner

United States Department of Agriculture Wildlife Services: Staff Publications

Deer and elk provide many desirable recreational opportunities but also can cause severe conflicts with humans. Excluding them from agricultural resources or from roadways is desirable, but fencing is expensive. A chemical barrier would offer a feasible alternative to reduce damage caused by deer. A series of three tests was conducted to assess whether black-tailed deer avoided areas treated with Wolfin, a synthetic predator odor. Wolfin failed to repel deer during any of these trials. We conclude that Wolfin, as applied within this study, is unlikely to reduce problems roused by free-ranging deer. West. J Appl. For. 16(4):182-186.

มองวิกฤติมหาอุทกภัย 2554 เพื่อแก้ไขวิกฤติภาวะโลกร้อน, มนนภา เทพสุด

Thai Environment

No abstract provided.

เสียงรบกวนจากโรงไฟฟ้าถ่านหิน, นพภาพร พานิช

Thai Environment

No abstract provided.

แนะนำโครงการของสถาบันวิจัยสภาวะแวดล้อม : การศึกษาเบื้องต้นต่อความต้องการใช้ระบบบำบัดน้ำเสียรวมในนิคมอุตสาหกรรมบางชัน, พักตร์ เพียรล้ำเลิศ

Thai Environment

No abstract provided.

Water Resources Review - Fall 2001 Vol 14 No 2, Annis Water Resources Institute

AWRI Reviews

No abstract provided.

Α-Amino-Β-Sulphone Hydroxamates As Potent Mmp-13 Inhibitors That Spare Mmp-1, Daniel P. Becker Ph.D., Thomas E. Barta, Louis Bedell, Gary Decrescenzo, John Freskos, Daniel P. Getman, Susan L. Hockerman, Madeleine Li, Pramod Mehta, Brent Mischke, Grace E. Munie, Craig Swearingen, Clara I. Villamil

Chemistry: Faculty Publications and Other Works

A series of α-amino-β-sulphone hydroxamates was prepared and evaluated for potency versus MMP-13 and selectivity versus MMP-1. Various substituents were employed on the α-amino group (P1 position), as well as different groups attached to the sulphone group extending into P1′. Low nanomolar potency was obtained for MMP-13 with selectivity versus MMP-1 of >1000× for a number of analogues.

α-Amino-β-sulphone hydroxamates were prepared, which are potent MMP-13 inhibitors with selectivity versus MMP-1 of >1000× for a number of analogues. Selected compounds exhibited oral bioavailability.

Derivation Of Del180 From Sediment Core Log Data' Implications For Millennial-Scale Climate Change In The Labrador Sea, M. E. Weber, Larry A. Mayer, C. Hillaire-Marcel, G. Bilodeau, F. Rack, R. N. Hiscott, A. E. Aksu

Center for Coastal and Ocean Mapping

Sediment core logs from six sediment cores in the Labrador Sea show millennial-scale climate variability during the last glacial by recording all Heinrich events and several major Dansgaard-Oeschger cycles. The same millennial-scale climate change is documented for surface water δ¹⁸O records of Neogloboquadrina pachyderma (left coiled); hence the surface water δ¹⁸O record can be derived from sediment core logging by means of multiple linear regression, providing a paleoclimate proxy record at very high temporal resolution (70 years). For the Labrador Sea, sediment core logs contain important information about deepwater current velocities and also reflect the variable …

Acoustic Wave Heating Of The Thermosphere, Michael P. Hickey Ph.D., G. Schubert, R. L. Walterscheid

Publications

A numerical model is used to study the dissipation in the thermosphere of upward propagating acoustic waves. Whereas dissipating gravity waves can cool the upper atmosphere through the effects of sensible heat flux divergence, it is found that acoustic waves mainly heat the thermosphere by viscous dissipation. Though the amplitudes of acoustic waves in the atmosphere are poorly constrained, the calculations suggest that dissipating acoustic waves can locally heat the thermosphere at rates of tens of kelvins per day and thereby contribute to the thermospheric energy balance. It is shown that viscous heating cannot be calculated from the divergence of …

Diversity Of Plant-Parasitic Nematodes And Their Relationships With Some Soil Physico-Chemical Characteristics In Improved Fallows In Western Kenya, Serigne T. Kandji, Callistus K.P.O. Ogol, Alain Albrecht

All Peer-Reviewed Publications

A survey was conducted in the food crop production area of western Kenya to characterise the nematode communities in different cropping systems and to monitor the effect of improved fallows on the abundance, diversity and community structure of plant-parasitic nematode assemblages. Soil samples were taken from short-term natural fallows (<3 years), old natural fallows (>20 years), maize/beans cultivated fields and improved fallows with Crotalaria grahamiana, Sesbania sesban and Tephrosia vogelii. The Shannon diversity index and evenness were used to assess nematode diversity in the different cropping systems. The relationships between plant-parasitic nematodes and the soil physico-chemical properties were investigated with principal component analysis and …

Measurements Of C V Flows From Thermal Charge-Exchange Excitation In Divertor Plasmas, B. Zaniol, R. C. Isler, N. H. Brooks, W. P. West, Ronald E. Olson

Physics Faculty Research & Creative Works

Certain transitions of C IV (C³⁺) from n=7 to n=6 (≈7226 Å) and from n=6 to n=5 (≈=4660 Å) sometimes appear much brighter in tokamak divertors than expected for electron-impact excitation from the ground state. This situation occurs because of charge exchange between C V (C⁴⁺) and recycling thermal deuterium atoms in the n=2 level. As a result, it is possible to extend parallel flow measurements of carbon, which have previously been performed on C II-C IV ions using Doppler shift spectroscopy, to include flows of the He-like C V ions. The work described here includes …

Spectroscopy And Orbital Periods Of Four Cataclysmic Variable Stars, John R. Thorstensen, Cynthia J. Taylor

Dartmouth Scholarship

We present spectroscopy and orbital periods P_orb of four relatively little-studied cataclysmic variable stars. The stars and their periods are: AF Cam, P_orb = 0.324(1) d (the daily cycle count is slightly ambiguous); V2069 Cyg (= RX J2123.7+4217), 0.311683(2) d; PG 0935+075, 0.1868(3) d; and KUV 03580+0614, 0.1495(6) d. V2069 Cyg and KUV 03580+0614 both show He iiλ4686 emission comparable in strength to Hβ. V2069 Cyg appears to be a luminous nova-like variable, and the strong He ii suggests it may be an intermediate polar. The period of KUV 03580+0614 is similar to members …

The Distribution Of Airborne Coal Dust In Soil Profiles Of Norfolk, Va And Its Implication For Arsenic Loading To These Soils, William Joseph Bounds

OES Theses and Dissertations

Norfolk, Virginia is home to the Northern Hemisphere's largest coal terminal the Lamberts Point Docks. The coal loading process of this terminal creates large amounts of coal dust, which subsequently is distributed throughout the local region by atmospheric transport and deposition. While the coal dust itself poses only minor health hazards, certain trace elements within the coal, particularly arsenic, may pose environmental as well as significant health hazards. Within coal, arsenic occurs primarily in the mineral pyrite. As pyrite in the coal dust is subsequently oxidized via exposure to the atmosphere and/or meteoric water, arsenic may be released to the …

Monte Carlo Studies Of Mott Scattering Asymmetries From Gold Foils, M. A. Khakoo, D. Roundy, C. Hicks, N. Margolis, E. Yeung, A. W. Ross, Timothy J. Gay

Timothy J. Gay Publications

We present the results of a series of model Monte Carlo calculations of the scattering of spin-polarized electrons from gold foil targets. Our calculations examine the behavior of the left-right scattering asymmetry A as a function of various parameters conventionally used in extrapolation of the left-right asymmetry to single atom and/or elastic scattering conditions. These parameters include target thickness, scattered count rate, and the maximum energy that an electron can have lost in the target and still be detected. Data are obtained at incident electron energies of 10–120 keV, with detector-subtended half-cone angles of 5°, 10°, and 20°, and gold …

Synthesis Of Cyclopropane Containing Natural Products, William A. Donaldson

Chemistry Faculty Research and Publications

The synthesis of select cyclopropane containing natural products is presented.

Computational Fluid Dynamic Study Of A Nascar Winston Cup Series Race Car, Terry L. Meek Jr.

Mechanical & Aerospace Engineering Theses & Dissertations

Since the goal of NASCAR racing is to win and since drag is a force the vehicle must overcome, a thorough understanding of the drag generating airflow around and through the automobile is greatly desired. The external airflow contributes to most of the drag that a car experiences and most of the downforce the vehicle produces. Therefore, an estimate of the vehicle's performance may be evaluated using a computational aerodynamics model. This thesis presents a computational fluid dynamic (CFD) analysis of a NASCAR Winston Cup series race car to investigate the salient flow characteristics.

Before a computational analysis could be …