Digital Commons Network^™

Experimental Investigation On Voip Performance And The Resource Utilization In 802.11b Wlans, Miroslaw Narbutt, Mark Davis

Conference papers

In a shared medium network like the 802.11b WLAN, predicting the quality of VoIP calls from the resource usage of the wireless medium is highly desirable. Analyzing the bandwidth usage at the L2/MAC layer may be especially useful for potential QoS provisioning and call admission schemes. This paper experimentally investigates the relationship between resource utilization in WLANS and the quality of VoIP calls transmitted over wireless medium. Specifically we evaluate how the amount of free bandwidth influences transmission impairments (i.e. delay, loss and jitter) and thus call quality. Resource utilization (under the MAC bandwidth components framework) is calculated by a …

Serious Gordon Using Serious Games To Teach Food Safety In The Kitchen, Brian Mac Namee, Pauline Rooney, Patrick Lindstrom, Andrew Ritchie, Frances Boylan, Greg Burke

Papers, presentations and other resources

This paper will describe the development of Serious Gordon, an interactive digital game developed to tech the basics of kitchen food safety to workers in industries dealing with food. The motivations driving the development of the game will be described as will the development process itself. An initial evaluation of the game, from both a technical and pedagogical point of view, will be presented as will conclusions on the viability of using a commercial game engine for the purpose of developing educational games.

The Transforming Power Of Grace, Eamon Maher

Articles

Material reproduced by kind permission of Reality

Integrated Guidance And Control Of Missiles With Θ-D Method, Ming Xin, S. N. Balakrishnan, Ernest J. Ohlmeyer

Mechanical and Aerospace Engineering Faculty Research & Creative Works

A new suboptimal control method is proposed in this study to effectively design an integrated guidance and control system for missiles. Optimal formulations allow designers to bring together concerns about guidance law performance and autopilot responses under one unified framework. They lead to a natural integration of these different functions. by modifying the appropriate cost functions, different responses, control saturations (autopilot related), miss distance (guidance related), etc., which are of primary concern to a missile system designer, can be easily studied. A new suboptimal control method, called the θ-D method, is employed to obtain an approximate closed-form solution to this …

Violence And Coping Of Emergency Department Nurses, Sarah Fraser

Graduate Research Projects

The purpose of this research is to gather information about the types of interventions that best help victims of ED violence. Studies demonstrate that there is a definite problem of violence in the Emergency Department (ED). Studies also show there has been an increase in the victimization of ED staff. The problem of violence in the ED is not just a problem within the United States but also found in countries such as Ireland and Australia. There is a need to improve the safety measures of the ED so that staff will feel safe and can perform their jobs efficiently …

Library Organizational Charts

Library Organizational Charts (1995-2018)

No abstract provided.

Obstetric Cerebral Venous Thrombosis, Bhojo Khealani, Uzma U Mapari, Rozina Sikandar Sultanali

Department of Obstetrics & Gynaecology

Pregnancy and puerperium are most prevalent prothrombotic states leading to cerebral venous thrombosis. Likelihood of stroke to be of venous origin is greater in stroke associated with pregnancy compared to stroke unrelated to pregnancy. Pregnancy induces several changes in coagulation system, which persists at least during early puerperium, rendering it a prothrombotic state. Hypercoaguability worsens further after delivery as a result of volume depletion and trauma. During puerperium additional risk factors include infection and instrumental delivery or Caesarean section. The management follows general rules as for the venous thrombosis unrelated to pregnancy, however the prognosis is different.

Transformer-Type Seeding System Of A Helical Fcg Based On A Transverse Shock Wave Ferromagnetic Generator, Sergey I. Shkuratov, Evgueni F. Talantsev, Jason Baird, Allen H. Stults, Larry L. Altgilbers

Mining Engineering Faculty Research & Creative Works

A new application of the effect of transverse-shock-wave demagnetization of Nd2Fe14B high-energy hard ferromagnets for powering an explosive-driven helical flux compression generator (FCG) is proposed. The novel FCG seeding system based on a compact transverse shock-wave ferromagnetic generator (FMG) containing a 200-cm3 Nd2Fe14B energy-carrying element and a 12 g high explosive charge was designed, constructed, and tested. The proposed design is based on the idea that the wide coaxial single-turn pulse-generating coil of the FMG can simultaneously serve as a seed coil for the FCG. The coaxial single-turn pulse-generating coil of the FMG was wound on the initial part of …

Using Coupled Eulerian And Lagrangian Grids To Model Explosive Interactions With Buildings, Braden Lusk, William P. Schonberg, Jason Baird, Robert S. Woodley, Warren Noll

Mining Engineering Faculty Research & Creative Works

This paper presents the development of a computational model that can be used to study the interactions between structures and detonating explosives contained within them. This model was developed as part of an effort to develop a rubble characterization model for use in AmmoSIM, an agent based urban tactical decision aid (UTDA) software for weapon-target pairing. The rubble pile created following the collapse of a building in a combat situation can significantly impact mission accomplishment, particularly in the area of movement and maneuver. The information provided by AmmoSIM will enable both platoon level and command center staff to make informed …

K Α₁ Radiation From Heavy, Heliumlike Ions Produced In Relativistic Collisions, Andrey S. Surzhykov, Ulrich D. Jentschura, Th H. Stohlker, Stephan Fritzsche

Physics Faculty Research & Creative Works

Bound-state transitions in few-electron, heavy ions following radiative electron capture are studied within the framework of the density matrix theory and the multiconfiguration Dirac-Fock approach. Special attention is paid to the K α₁ (1 s_1/2 2 p_3/2 ^1.3P_J=1,2→1s²_1/2 ¹S_J=0) radiative decay of heliumlike uranium U⁹⁰⁺ projectiles. This decay has recently been observed at the GSI facility in Darmstadt, giving rise to a surprisingly isotropic angular distribution, which is inconsistent with previous experiments and calculations based on a "one-particle" model. We show that the unexpected isotropy essentially results from …

A Transmission Electron Microscope For Lecture Demonstrations, J. A. Panitz, Gertrude Rempfer

Physics Faculty Publications and Presentations

A simple transmission electron microscope (TEM) suitable for lecture demonstrations is described. In this TEM electrons are created in a glow discharge between two parallel electrodes in air at a reduced pressure. The electrons are collimated by a small hole in theanode, focused by a solenoid that acts as an electromagnetic lens, and imaged on a thin layer of phosphor deposited inside an Erlenmeyer flask. An image of a biological sample placed between the source and the lens can be magnified about 20 times. The microscope uses inexpensive components that can be quickly assembled during a demonstration. The TEMprovides a …

Transmission Electron Goniometry And Its Relation To Electron Tomography For Materials Science Apoplications, Peter Moeck, P. Fraundorf

Physics Faculty Publications and Presentations

Aspects of transmission electron goniometry are discussed. Combined with high resolution phase contrast transmission electron microscopy (HRTEM) and atomic resolution scanning TEM (STEM) in the atomic number contrast (Z-STEM) or the phase contrast bright field mode, transmission electron goniometry offers the opportunity to develop dedicated methods for the crystallographic characterization of nanocrystals in three dimensions. The relationship between transmission electron goniometry and electron tomography for materials science applications is briefly discussed. Internet based java applets that facilitate the application of transmission electron goniometry for cubic crystals with calibrated tilt-rotation and double-tilt specimen holders/goniometers are mentioned. The so called cubic-minimalistic tilt …

Microstructural Modification Of As-Cast Al-Si-Mg Alloy By Friction Stir Processing, Z. Y. Ma, S. R. Sharma, Rajiv S. Mishra

Materials Science and Engineering Faculty Research & Creative Works

Friction stir processing (FSP) has been applied to cast aluminum alloy A356 plates to enhance the mechanical properties through microstructural refinement and homogenization. the effect of tool geometry and FSP parameters on resultant microstructure and mechanical properties was investigated. the FSP broke up and dispersed the coarse acicular Si particles creating a uniform distribution of Si particles in the aluminum matrix with significant microstructural refinement. Further, FSP healed the casting porosity. These microstructural changes led to a significant improvement in both strength and ductility. Higher tool rotation rate was the most effective parameter to refine coarse Si particles, heal the …

Electrophysiological Responses Of The Lepidopterous Stemborers Chilo Partellus And Busseola Fusca To Volatiles From Wild And Cultivated Host Plants, M. A. Birkett, K. Chamberlain, Z. R. Khan, J. A. Pickett, T. Toshova, L. J. Wadhams, C. M. Woodcock

All Peer-Reviewed Publications

The stemborers Chilo partellus and Busseola fusca are major pests of subsistence cereal farming in Africa. Volatiles released by two cultivated hosts, sorghum and maize (Sorghum bicolor and Zea mays), and two wild grass hosts, Pennisetum purpureum and Hyparrhenia tamba, were collected by air entrainment. Electrophysiologically active components in these samples were detected by coupled gas chromatography-electroantennography (GC-EAG), and the active peaks identified by gas chromatography-mass spectrometry. A total of 41 compounds were identified from the four plant species, all of which, as well as two unidentified compounds, elicited an electrophysiological response from one or both of the stemborers. The …

Farmers' Market, Fall Feast Offer Homegrown Fare, University Relations

Campus News Archive

Mark your calendars for the Pride of the Prairie Farmers’ Market and Fall Feast coming to the University of Minnesota, Morris on Thursday, Nov. 9. The public is invited to enjoy homegrown food and entertainment.

Campus Comes Together For Anti-Hate Rally, University Relations

Campus News Archive

Students, staff and faculty came together November 1 on the campus mall in what was billed as an Anti-Hate Rally. The rally was sponsored by H.E.A.T. (Hate Education Awareness Team).

Chain Of Custody, N. Tansrisawad

Chulalongkorn Medical Journal

No abstract provided.

The Acceptance Of Scientific Evidence, N. Tansrisawad, C. Suwantip

Chulalongkorn Medical Journal

No abstract provided.

Mean Time Spent On Gross Exam Of Complete Forensic Autopsy At Chulalongkorn Forensic Medicine Center, N. Tansrisawad, T. Jong Sakul, U. Hoonwijit, K. Vongpaisarnsin

Chulalongkorn Medical Journal

No abstract provided.

Prevalence Of Anemia In Pre - School Childrenin Krabi Province, S. Suwantaroj, Y. Betest, S. Promsang

Chulalongkorn Medical Journal

No abstract provided.

Botulism, W. Charaschaisri, W. Prueksanan

Chulalongkorn Medical Journal

No abstract provided.

The Uab Mascot Entertains Fans At A Blazer Basketball Game, Circa 1981, Uab Archives

Images of the Month from UAB Archives

Image ID: P6, #001

A rooster mascot shows an eye chart to the crowd at a basketball game

Preventive Medicine: A "Cure" For The Healthcare Crisis, Janice L. Clarke, Deborah Meiris

College of Population Health Faculty Papers

Introductory Editorial: Few would dispute the premise that prevention, early detection, and early intervention form the first line of defense on the disease management (DM) continuum. That being the case, our national statistics on preventive health should be raising concerns throughout the industry. The US healthcare delivery system continues to fall woefully short of its prevention targets. On the international scene, the United States lags behind countries with less wealth and less technological savvy. Commentaries abound on the problems, but recently I became aware of an organization with an exciting goal and a novel solution for bringing preventive medicine …

On The Effective Communication Of The Results Of Empirical Studies, Part Ii, Lee Epstein, Andrew D. Martin, Matthew M. Schneider

Vanderbilt Law Review

In an important and certainly timely article published in the N.Y. U. Law Review, Nancy C. Staudt demonstrates that, in taxpayer standing cases, judges are motivated by politics but can be constrained when the law is clear and oversight exists. As part of that demonstration, Professor Staudt offers an empirical analysis of the decision to grant standing to federal taxpayers-the results of which we reproduce in Table 1.2

What are we to make of this rather ominous-looking table? Professor Staudt suggests two key takeaways. First, the analysis, she reports, shows that doctrine helps explain standing decisions even when political factors …

Juror Questions During Trial: A Window Into Juror Thinking, Shari Seidman Diamond, Mary R. Rose, Beth Murphy, Sven Smith

Vanderbilt Law Review

The jury has undergone a dramatic transformation from its earliest incarnation when jurors acted as witnesses, investigators, and tribunal. In the modern American jury trial, the parties determine what jurors learn during the proceedings. Jurors of today, assigned the role of audience members until deliberations begin, typically speak in the courtroom only during jury selection and through their verdict at the end of the trial. In light of their enforced silence throughout the trial, jurors have no opportunity to clarify or check on their interpretation of the evidence and they provide few external indications about their thinking as the trial …

The Commodification Of Insurance Defense Practice, Herbert M. Kritzer

Vanderbilt Law Review

In this paper, I present an analysis of insurance defense practice using the heuristic of a commodity.7 Essentially, I argue that many, perhaps even most, insurance companies have come to view the more routine work of insurance defense as something to be purchased in a marketplace where there are a large number of interchangeable providers.8 Loyalty between buyer and seller, to the extent that it had been an important element of the relationship, has faded. Today, insurance companies frequently shop for the best deal, which may include producing insurance defense services in-house rather than purchasing those services from an outside …

In Texas, Life Is Cheap, Frank Cross, Charles Silver

Vanderbilt Law Review

What is the life of a Texan worth? Some might suggest very little. Payments in thousands of tort cases in which Texans died provide some evidence for this hypothesis. Although Texas has been a focus of much of the national controversy over the costs of tort litigation, payments in death cases have seen relatively little disciplined research. Existing research often misses the primary effect of the system because it focuses on trial outcomes rather than settlement payments. This Article provides some evidence of the actual payments made in Texas in death cases, their determinants, and the implications of those findings …

Computed Tomographic Imaging Of Cerebral Venous Thrombosis, Mohammad Kamran Kamal

Department of Radiology

Cerebral venous thrombosis (CVT) is an entity which is not rare and can have devastating consequences if not diagnosed and treated in a timely manner. Although, the gold standard for diagnosing this entity is a catheter angiogram, magnetic resonance venography, by virtue of its non-invasiveness and detailed demonstration of the cerebral venous structures, has become the diagnostic modality of choice for this entity. However, in a resource-strapped country like Pakistan, CT scan remains the primary first (and sometimes the only) diagnostic modality used in patients with neurological problems. Therefore, it is important to recognize the signs of cerebral venous thrombosis …

Mri And Mrv In Cerebral Venous Thrombosis, Zafar Sajjad

Department of Radiology

Although Cerebral venous thrombosis is an uncommon cause of stroke among the young, it is being increasingly recognised. A prothrombotic risk factor is identified in the majority of the patients. In most instances it is seen in women in the post-partum period and those on oral contraceptives. Magnetic Resonance Imaging (MRI) has improved our ability to diagnose this condition however the variability of radiological and clinical presentation remains a challenge. MR in combination with MR venography (MRV) is the single most sensitive diagnostic technique. The MR appearance of the thrombus within the dual sinus or cortical vein is variable and …

Thrombolytic Therapy In Cerebral Venous Sinus Thrombosis., Ayeesha Kamran Kamal

Department of Medicine

The use of thrombolytic agents to rapidly lyse the clot has emerged as a therapeutic modality, in concert with interventional neuroradiologic approaches to deliver the agent locally at the site of thrombosis. There are no randomized, double blind, placebo, controlled trials to support thrombolysis as a first line therapy in patients with cerebral venous sinus thrombosis compared to standard therapy using anticoagulation with weight based dose adjusted unfractionated Heparin. Numerous case reports and a single non randomized trial have shown that it is comparatively safe and may rescue patients who are deteriorating despite anticoagulation with unfractionated Heparin. Consideration must be …