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2007

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Articles 5461 - 5490 of 5729

Full-Text Articles in Physical Sciences and Mathematics

Air Masses, Storm Project Jan 2007

Air Masses, Storm Project

Open Educational Resources

Objectives:
• Students will learn and become familiar with the four air masses: cold and dry; cold and humid; hot and dry; and hot and humid.
• Students will learn that air masses have specific characteristics: temperature and humidity, the leading edge of the air mass is called the front, a front is the boundary between two air masses, and movement of air masses brings certain weather conditions with it.

National Science Education Standards: All students should develop: abilities necessary to do scientific inquiry, properties of earth materials, and changes in earth and sky.


Structure Of The Atmosphere, Storm Project Jan 2007

Structure Of The Atmosphere, Storm Project

Open Educational Resources

National Science Education Standards: As a result of activities in grades 5-8, all students should develop an understanding of: abilities necessary to do scientific inquiry, properties and changes of properties in matter, understandings about science and technology, and structure of the earth system.


Winds Around Highs And Lows, Storm Project Jan 2007

Winds Around Highs And Lows, Storm Project

Open Educational Resources

National Science Education Standards: As a result of activities in grades 5-8, all students should develop an understanding of motions and forces, structure of the earth system, and understandings about science and technology.


Fronts, Storm Project Jan 2007

Fronts, Storm Project

Open Educational Resources

National Science Education Standards: As a result of activities in grades 5-8, all students should be able to develop an understanding about scientific inquiry, structure of earth system, and understandings about science and technology.


Precipitation Patterns, Storm Project Jan 2007

Precipitation Patterns, Storm Project

Open Educational Resources

Objective: Students will demonstrate the relationship between precipitation types and surface temperatures.They will use forecast maps to predict where snow or rain will fall over the next several days.

National Science Education Standards – As a result of activities in grades 5-8, all students should develop an
understanding of structure of the earth system.


Upper Air Plots, Storm Project Jan 2007

Upper Air Plots, Storm Project

Open Educational Resources

Objectives: Students will study air patterns at three different levels of the troposphere.

National Science Education Standards: As a result of activities in grades 5-8, all students should develop an understanding of: abilities necessary to do scientific inquiry, properties and changes of properties in matter, understandings about science and technology, and structure of the earth system.


Air Pressure And Weather, Storm Project Jan 2007

Air Pressure And Weather, Storm Project

Open Educational Resources

Objective: Students will learn about relationships between air pressure and weather changes.

National Science Education Standards: As a result of activities in grades 5-8, all students should develop: understandings about scientific inquiry, structure of the earth system, and understanding about science and technology.


Decoding Metar Data, Storm Project Jan 2007

Decoding Metar Data, Storm Project

Open Educational Resources

Objectives: Students will decode a METAR report and convert the decoded METAR data to a station model plot.

National Science Education Standard: All students should develop an understanding of: abilities necessary to do scientific inquiry, properties and changes of properties in matter, understandings about science and technology, and structure of the earth system.


Reading And Using Meteograms, Storm Project Jan 2007

Reading And Using Meteograms, Storm Project

Open Educational Resources

Objectives:Students learn how hourly weather data is plotted on a meteogram, and how to interpret the data. They will relate meteogram data to surface weather maps.

National Science Education Standards: As a result of activities in grades 5-8, all students should develop an understanding of: abilities necessary to do scientific inquiry, properties and changes of properties in matter, understandings about science and technology, and structure of the earth system.

As a result of their activities in grades 9-12, all students should develop an understanding of Energy in the earth System: The sun is the major external source of energy; Heating …


Relationship Between Soil Moisture Of Near Surface And Multiple Depths Of The Root Zone Under Heterogeneous Land Uses And Varying Hydroclimatic Conditions, Rezaul Mahmood Jan 2007

Relationship Between Soil Moisture Of Near Surface And Multiple Depths Of The Root Zone Under Heterogeneous Land Uses And Varying Hydroclimatic Conditions, Rezaul Mahmood

School of Natural Resources: Faculty Publications

No abstract provided.


Impacts Of The Agricultural Green Revolution Induced Land Use Changes On Air Temperatures In India, Rezaul Mahmood Jan 2007

Impacts Of The Agricultural Green Revolution Induced Land Use Changes On Air Temperatures In India, Rezaul Mahmood

School of Natural Resources: Faculty Publications

No abstract provided.


Optimal Layout Of Multicast Groups Using Network Embedded Multicast Security In Ad Hoc Sensor Networks, Richard R. Brooks, Brijesh Pillai, Michele C. Weigle, Matthew Pirretti Jan 2007

Optimal Layout Of Multicast Groups Using Network Embedded Multicast Security In Ad Hoc Sensor Networks, Richard R. Brooks, Brijesh Pillai, Michele C. Weigle, Matthew Pirretti

Computer Science Faculty Publications

This paper considers the security of sensor network applications. Our approach creates multicast regions that use symmetric key cryptography for communications. Each multicast region contains a single keyserver that is used to perform key management and maintain the integrity of a multicast region. Communications between two multicast regions is performed by nodes that belong to both regions. To ease the network management burden, it is desirable for the networks to self-organize into regions and dynamically select their keyservers. This paper shows how to determine the number of keyservers (k) to use and the size in the number of hops (h) …


Istart 2: Improvements For Efficiency And Effectiveness, Irwin B. Levinstein, Chutima Boonthum, Srinivasa P. Pillarisetti, Courtney Bell, Danielle S. Mcnamara Jan 2007

Istart 2: Improvements For Efficiency And Effectiveness, Irwin B. Levinstein, Chutima Boonthum, Srinivasa P. Pillarisetti, Courtney Bell, Danielle S. Mcnamara

Computer Science Faculty Publications

iSTART (interactive strategy training for active reading and thinking) is a Web-based reading strategy trainer that develops students' ability to self-explain difficult text as a means to improving reading comprehension. Its curriculum consists of modules presented interactively by pedagogical agents: an introduction to the basics of using reading strategies in the context of self-explanation, a demonstration of self-explanation, and a practice module in which the trainee generates self-explanations with feedback on the quality of reading strategies contained in the self-explanations. We discuss the objectives that guided the development of the second version of iSTART toward the goals of increased efficiency …


Assessing The Format Of The Presentation Of Text In Developing A Reading Strategy Assessment Tool (R-Sat), Sara Gilliam, Joseph P. Magliano, Keith K. Millis, Irwin Levinstein, Chutima Boonthum Jan 2007

Assessing The Format Of The Presentation Of Text In Developing A Reading Strategy Assessment Tool (R-Sat), Sara Gilliam, Joseph P. Magliano, Keith K. Millis, Irwin Levinstein, Chutima Boonthum

Computer Science Faculty Publications

We are constructing a new computerized test of reading comprehension called the Reading Strategy Assessment Tool (R-SAT). R-SAT elicits and analyzes verbal protocols that readers generate in response to questions as they read texts. We examined whether the amount of information available to the reader when reading and answering questions influenced the extent to which R-SAT accounts for comprehension. We found that R-SAT was most predictive of comprehension when the readers did not have access to the text as they answered questions.


How Much Preservation Do I Get If I Do Absolutely Nothing? Using The Web Infrastructure For Digital Preservation, Martin Klein, Frank Mccown, Joan A. Smith, Michael Nelson Jan 2007

How Much Preservation Do I Get If I Do Absolutely Nothing? Using The Web Infrastructure For Digital Preservation, Martin Klein, Frank Mccown, Joan A. Smith, Michael Nelson

Computer Science Faculty Publications

To date, most of the focus regarding digital preservation has been on removing copies of the resources to be preserved from the “living web” and placing them in an archive for controlled curation. Once inside an archive, the resources are subject to careful processes of refreshing (making additional copies to new media) and migrating (conversion to new formats and applications). For small numbers of resources of known value, this is a practical and worthwhile approach to digital preservation. However, due to the infrastructure costs (storage, networks, machines) and more importantly the human management costs, this approach is unsuitable for web …


Crate: A Simple Model For Self-Describing Web Resources, Joan A. Smith, Michael L. Nelson Jan 2007

Crate: A Simple Model For Self-Describing Web Resources, Joan A. Smith, Michael L. Nelson

Computer Science Faculty Publications

If not for the Internet Archive’s efforts to store periodic snapshots of the web, many sites would not have any preservation prospects at all. The barrier to entry is too high for everyday web sites, which may have skilled webmasters managing them, but which lack skilled archivists to preserve them. Digital preservation is not easy. One problem is the complexity of preservation models, which have specific meta-data and structural requirements. Another problem is the time and effort it takes to properly prepare digital resources for preservation in the chosen model. In this paper, we propose a simple preservation model called …


Providing Vanet Security Through Active Position Detection, Gongjun Yan, Gyanesh Choudhary, Michele C. Weigle, Stephan Olariu Jan 2007

Providing Vanet Security Through Active Position Detection, Gongjun Yan, Gyanesh Choudhary, Michele C. Weigle, Stephan Olariu

Computer Science Faculty Publications

Our main contribution is a novel approach to enhancing position security in VANET. We achieve local and global position security by using the on-board radar to detect neighboring vehicles and to confirm their announced coordinates. We compute cosine similarity among data collected by radar and neighbors' reports to filter the forged data from the truthful data. Based on filtered data, we create a history of vehicle movement. By checking the history and computing similarity, we can prevent a large number of Sybil attacks and some combinations of Sybil and position-based attacks.


The Extent Of Interaction Between The Scallop And Prawn Fleets In The Shark Bay Scallop Managed Fishery, John Dickson Jan 2007

The Extent Of Interaction Between The Scallop And Prawn Fleets In The Shark Bay Scallop Managed Fishery, John Dickson

Theses : Honours

The Shark Bay Managed Scallop Fishery is Western Australia's most important scallop fishery with an annual value of between $2 and $58 million. In addition to this the fishery is an important source of regional employment with approximately 160 skippers and crew employed during the 2005 season. Two separate fleets are permitted to fish for scallops in this fishery, the first consisting of dedicated scallop fishing vessels (Class A licences) and the second of prawn fishing vessels (Class B licences) that are allowed to take scallops under a catch sharing arrangement. Concerns exist over the interactions between these two fleets …


Users' Perspectives And Attitudes Towards Web Application Security, Leonard Ticualu Jan 2007

Users' Perspectives And Attitudes Towards Web Application Security, Leonard Ticualu

Theses : Honours

The Internet has become an integral part of the society in many parts of the world. However, as the Internet becoming more important and useful, the problems with Web security have also increased. More people today have experienced Web security threats such as viruses, spyware, keyloggers, and phishing; and a not insignificant number have encountered financial fraud because of the online activities they conducted. This research investigated the security concerns and level of awareness of users in regards to the use of web applications, by identifying users' concerns of web applications, examining the relationship of users' technical knowledge and users' …


An Exploration Of Thresholds Of Tolerance For Changes To Sanctuary Zones Among Repeat Tourists: A Case Of Ningaloo Marine Park, Natasha Nicholson Jan 2007

An Exploration Of Thresholds Of Tolerance For Changes To Sanctuary Zones Among Repeat Tourists: A Case Of Ningaloo Marine Park, Natasha Nicholson

Theses : Honours

As environmental issues become more prevalent in today' s society, natural area managers must find ways to balance the increased popularity of natural areas for recreation with environmental protection and conservational goals. One popular method to achieve this balance is through restrictions. Sanctuary zones are one type of restriction and are generally designated areas that prohibit extractive uses of natural resources, such as fishing. This study qualitatively explores the issues that affect a repeat tourist's tolerance threshold for changes to their recreational activities caused by restrictions within the Ningaloo Marine Park. This study seeks to assist natural area managers to …


A Comparison Of Edge Detection Methods For Segmentation Of Skin Lesions In Mobile-Phone-Quality Images, Khanh Linh Hua Jan 2007

A Comparison Of Edge Detection Methods For Segmentation Of Skin Lesions In Mobile-Phone-Quality Images, Khanh Linh Hua

Theses : Honours

The world is faced with a rapidly increasing number of skin cancers every year. Melanoma is the most deadly type of skin cancer though it can be treated if it has been detected at an early stage. However, there is a shortage of dermatologists in rural areas. The increasing number of camera phones, together with improved coverage in rural areas gives some potential for tele-dermatology, whereby people with no local access to a dermatologist can send images of suspicious skin lesions to an expert for assessment. Merely relaying images to a human expert solves only part of the problem, there …


An Investigation Into The Application Of Data Mining Techniques To Characterize Agricultural Soil Profiles, Rowan J. Maddern Jan 2007

An Investigation Into The Application Of Data Mining Techniques To Characterize Agricultural Soil Profiles, Rowan J. Maddern

Theses : Honours

The advances in computing and information storage have provided vast amounts of data. The challenge has been to extract knowledge from this raw data; this has led to new methods and techniques such as data mining that can bridge the knowledge gap. The research aims to use these new data mining techniques and apply them to a soil science database to establish if meaningful relationships can be found. A data set extracted from the WA Department of Agriculture and Food (DAFW A) soils database has been used to conduct this research. The database contains measurements of soil profile data from …


Landholder Information For The Safe Use And Management Of Strychnine For Wild Dog Traps, Renee Donovan, David Goodall Jan 2007

Landholder Information For The Safe Use And Management Of Strychnine For Wild Dog Traps, Renee Donovan, David Goodall

Biosecurity published reports

Farmnote 33/2003 - Guide to the safe use of strychnine for jawed traps is included.

Strychnine is a highly poisonous substance that is used in Western Australia for the control of Wild Dogs and Emus. Its use is restricted by law.

This manual outlines your roles and responsibilities for using and managing Strychnine for Wild Dog control. In particular, this manual outlines the essential information you need to know in regard to:

  • The legislative requirements for Strychnine control in Western Australia
  • The properties and mode of action of Strychnine « How to lodge an application to use Strychnine
  • How to …


Sound Spectral Analysis Of Uni Carillon Bells, Kimberly Cordray Jan 2007

Sound Spectral Analysis Of Uni Carillon Bells, Kimberly Cordray

Honors Program Theses

The campanile located in the center of the University of Northern Iowa campus has been a symbol of the university since its completion in 1926. This 100 foot tall structure was the chosen memorial celebrating the 50th anniversary of the university and dedicated to the founders and builders. But this towering structure is more than just a popular gathering point and icon, it houses 4 7 bells and a carillon instrument which plays these bells.

Bells are a unique and complex instrument. It is not hard to comprehend when you think about what a bell is. A carillon bell is …


Crippling America, Health Care Fraud Incentives, Colby Goetsch Jan 2007

Crippling America, Health Care Fraud Incentives, Colby Goetsch

Honors Program Theses

Clearly an imbalance is occurring in the system as health care fraud claims reach new bounds. There are many types of health care fraud, but the most general analysis involves the submission of claims that never occurred for reimbursement. This thesis will analyze the incentives acting upon different groups affected by the specific act of health care fraud of submitting fraudulent claims, and also possible solutions to change these incentives into the public's best interest. An analysis of the incentives given to the key players in this game will hopefully show where legislators can focus to improve the current state …


Proceedings Of The 119th Annual Meeting Of The Iowa Academy Of Science [Program, 2007], Iowa Academy Of Science Jan 2007

Proceedings Of The 119th Annual Meeting Of The Iowa Academy Of Science [Program, 2007], Iowa Academy Of Science

Iowa Academy of Science Documents

Contents:

Welcome from the Executive Director --- 3
Program Summary/Timeline --- 4
Iowa Junior Academy of Science --- 6
General Session Presentations --- 7
Symposia Presentations --- 10
Senior Poster Program --- 14
Awards Luncheon --- 16
President's Banquet --- 16
IAS Annual Business Meeting --- 17
2006-2007 Officers and Volunteers --- 18
Notes --- 19
Field Trips --- 20
Section Meeting Programs and Oral Presentations (Alphabetical by Section) --- 22
Abstracts (by Section) --- 27
Author Index --- 53


Iowa Academy Of Science: The New Bulletin, V03n1, Winter 2007, Iowa Academy Of Science Jan 2007

Iowa Academy Of Science: The New Bulletin, V03n1, Winter 2007, Iowa Academy Of Science

New Bulletin

Inside This Issue:

--Message from the Executive Director

--New IAS Membership Brochure

--Evolution and Intelligent Design Conference

--REAP-CEP Program Funds Project WET

--National Outstanding New Biology Teacher

--119th Annual Meeting

--Financial Statements 2007

--Expedition Iowa

--A Message from Our President

--IAS Section Update

--Journal of the Iowa Academy of Science Update

--Outstanding Earth Science Teacher Award


Hybrid Training With Binary Search Protocol For Wireless Sensor Networks, Ruzana Ishak, Qingwen Xu, Stephan Olariu, Shaharuddin Salleh Jan 2007

Hybrid Training With Binary Search Protocol For Wireless Sensor Networks, Ruzana Ishak, Qingwen Xu, Stephan Olariu, Shaharuddin Salleh

Computer Science Faculty Publications

Locationing problem in Wireless Sensor Networks(WSN) can be viewed as a general distributed sensor problem. It is with sensors that can discover other nodes or estimate ranges between nodes. that serve as position references. In this paper. we show that sensors acquire coarse-grain location awareness by the training protocol. The training protocol which hybrids the synchronization and training procedure. In this protocol, synchronization and training are combined into one scheme. The sink node sends two beacons in each slot instead of one. In the training, sensor searching for its location using a binary search scheme. Our simulation results shown less …


Ichnogenic Porosity, High-Frequency Cyclostratigraphy, And Groundwater Flow In The Karst Biscayne Aquifer, Se Florida, Usa, Kevin Cunningham, H. Allen Curran Jan 2007

Ichnogenic Porosity, High-Frequency Cyclostratigraphy, And Groundwater Flow In The Karst Biscayne Aquifer, Se Florida, Usa, Kevin Cunningham, H. Allen Curran

Geosciences: Faculty Publications

No abstract provided.


Paleosalinity History Of Middle Holocene Lagoonal And Lacustrine Deposits In The Enriquillo Valley, Dominican Republic Based On Pore Morphometrics And Isotope Geochemistry Of Ostracoda, Pamela Medley, Neil E. Tibert, William P. Patterson, H. Allen Curran, Lisa Greer, Jean-Paul Colin Jan 2007

Paleosalinity History Of Middle Holocene Lagoonal And Lacustrine Deposits In The Enriquillo Valley, Dominican Republic Based On Pore Morphometrics And Isotope Geochemistry Of Ostracoda, Pamela Medley, Neil E. Tibert, William P. Patterson, H. Allen Curran, Lisa Greer, Jean-Paul Colin

Geosciences: Faculty Publications

The southwestern region of the Dominican Republic (Enriquillo Valley) contains exceptionally well-preserved, relict marine and saline lake deposits of mid-Holocne age. Abundant euryhaline ostracodes found in this deposit include Cyprideis salebrosa, C. mexicana, C. similis, and C. edentata. Morphometric and geochemical analyses performed on Cyprideis spp. provide high δ18O and δ13C values that are coincident with relative abundances of irregularly shaped pores that permeate the ostracode carapace. We recognize three stratigraphic intervals with distinct ostracode pore shape and stable isotope trends: (I) a 4.5-5.0m interval that contains ostracodes with highly irregular shaped pores (multiradiate) and …