197 research outputs found
sj-docx-1-sel-10.1177_17585732221142610 - Supplemental material for Surgical treatment options for articular cartilage defects of the glenohumeral joint: A systematic review
No full textSupplemental material, sj-docx-1-sel-10.1177_17585732221142610 for Surgical treatment options for articular cartilage defects of the glenohumeral joint: A systematic review by Danielle Dagher, Asher Selznick, Carlos Prada, Yasser Al Shehab, Timothy Leroux and Moin Khan in Shoulder & Elbow</p
International Conference on Industry, Engineering, and Management Systems (1994 : Cocoa Beach, Fla.)
No full textDigitized and published in SOAR: Shocker Open Access Repository by Wichita State University Libraries Technical Services, May 2022.The IEMS'94 conference committee: University of Central Florida Department of Industrial Engineering and Management Systems (Sponsor); Dr. William Swart (Conference General Chair); Dr. Ahman K. Elshennawy (Program Chair); Dr. Yasser A. Hosni (Publications Chair).Includes author index.This book features the proceedings of the 1994 Annual International Conference on Industry, Engineering, and Management Systems (IEMS '94), held March 14 -16, 1994 in Cocoa Beach, Florida. IEMS is organized by the University of Central Florida, Department of Industrial Engineering and Management Systems (UCF-IEMS). The conference is an excellent opportunity for academicians and practitioners to present their work and to exchange views on a variety of issues which relate to industry and its engineering management.
Authors from 11 countries have contributed more than 135 papers and presentations. All papers submitted for the proceedings went through a blind peer refereeing process where each paper was reviewed by at least two reviewers. Abstracts for presentations only and for those papers which did not make it in the final cut are also included in this document.Sponsor: Department of Industrial Engineering and Management Systems, University of Central Florida.The papers are organized into eight tracks encompassing all sessions of the conference. The tracks are: I. Quality Issues -- II. CIM and Manufacturing Technologies -- III. Computer Based Systems -- IV. Human Engineering -- V. Systems Engineering and Control -- VI. Simulation, Training, and Engineering Education -- VII. Optimization and Decision Support Systems -- VIII. Global Issues
Does the NCAA Exploit College Athletes? Rights of Publicity, EA Sports and the Video Game Industry
No full textSean M. Hanlon is a member of the litigation department of Holland & Hart in Denver, Colorado, with a focus on construction and real estate litigation. Prior to joining Holland & Hart, Sean was a litigation associate with GableGotwals in Tulsa, Okla. Previously, he clerked for the Honorable Sam A. Joyner of the United States District Court for the Northern District of Oklahoma. Sean is admitted to practice in both Colorado and Oklahoma. He is also admitted to practice in the United States District Courts for the District of Colorado and the Northern District of Oklahoma.
Professor Ray Yasser has served as plaintiff\u27s counsel in a number of Title IX (gender equality) sports cases, several of which were settled in 1997. He is co-author of Sports Law: Cases and Materials , a sports law casebook widely used in law schools around the country. Professor Yasser, who earned his J.D. in 1974 from Duke Law School, teaches torts, trial practice and sports law. Prior to joining the TU law faculty, he served in the North Carolina Attorney General\u27s Office
Analysis of physiological death in equine chondrocytes
No full textDeposited with permission of the author. © 2007 Dr. Yasser Ahmed.Chondrocytes in growth cartilage undergo proliferation, hypertrophy, and then die by a mechanism that has not been characterised. The aims of the current study were to document the morphology of dying hypertrophic chondrocytes in equine growth cartilage and to establish a culture system in which the isolated chondrocytes can be induced to undergo the same modes of hypertrophy and physiological death seen in growth cartilage in vivo. Growth cartilage from foetal and growing postnatal horses was examined by electron microscopy. Ultrastructural studies of the tissue specimens suggested that the two types of hypertrophic chondrocytes that have previously been described as dark and light cells were dying by different non-apoptotic forms of cell death. Dying hypertrophic dark chondrocytes were characterised by a dark nucleus, and their cytoplasm appeared to undergo extrusion into the extracellular matrix, whereas light chondrocytes appeared to disintegrate within the cell membrane
Digital transformation framework for the egyptian manufacturing industry
No full textDigital transformation is of crucial importance in the manufacturing industry, especially
after the COVID-19 pandemic because of the increasing need for remote working and
socially distanced workplaces. However, there is a lack of a clear and well-defined
process to implement digital transformation in manufacturing. This research aims to
develop an innovative framework to support digital transformation in the manufacturing
sector and define its key assessment criteria for its successful implementation.
This research contributes to the body of literature by creating a prioritised DT
implementation method that is specifically customised for the manufacturing industry in
Egypt. Additionally, this study considers the majority of DT process implementation
factors, including leadership support, human factors, and digital technologies. A mixed
research methodology approach has been employed in this research. Firstly, an
extensive literature review related to digital transformation in the manufacturing industry
was conducted. Secondly, a mixed method techniques were implemented to gather the
required data from experts who are involved in digital transformation projects in their
companies. Validation of the results was carried out using real life industrial case
studies and experts judgment.
The digital transformation process comprises eight stages covering technology,
management, communications, and customer elements. The main contribution of this
research work is the balance between the different elements of digital transformation –
digital technologies, leadership and strategy, people and business processes – to
create an integrated 8-step process of digital transformation in the manufacturing sector
of developing economies such as the Egyptian economy.
A new readiness assessment model was developed to measure the degree of
readiness of manufacturing organisations to begin and develop their digital
transformation processes. The model uses two dimensions as assessment criteria
namely, Business Competencies Dimension and Technology Competencies Dimension.
In addition, a proposed model of four main attributes and 19 sub-attributes was
developed to determine the most important attributes regarding digital leadership given
the special nature of developing economies and cultural and environmental changes in
the Egyptian economy. The results indicated that an innovation mindset is the most
important attribute to becoming a successful digital leader, followed by a digital
business mindset, then the transformational mindset, and finally the inspirational
mindset.
Digital Transformation processes are unique and different from one case to another.
Helping manufacturing organisations assess their readiness for Digital Transformation
processes from a strategic level helps them better understand their capabilities and
draw their vision based on this assessment.PhD in Manufacturin
Joseph and Evelyn Lowery Meet With Yasser Arafat, September 20, 1979
No full textSouthern Christian Leadership Conference (SCLC) President Joseph E. Lowery (second from left) is shown with his wife Evelyn and other members of the SCLC delegation that traveled to Lebanon as part of a peace mission. The SCLC delegation stand with Yasser Arafat (at center), the chairman of the Palestinian Liberation Organization.The Atlanta University Center Robert W. Woodruff Library acknowledges the generous support of the Joseph & Evelyn Lowery Institute for Justice and Human Rights, the Joseph Echols Lowery Irrevocable Trust, and other donors in supporting the processing and digitization of Morehouse College's Joseph Echols and Evelyn Gibson Lowery Collection
Essays on river mechanics
No full textCER89-90-PYJ-14.Presented by the Graduate Students in CE 717 River Mechanics (Spring 1990).Instructor: P. Y. Julien.Includes bibliographical references.May 1990.Predicting Sediment Yield of a Watershed by Margaret Tauzer -- Particle Entrainment by River Flows by Kathy Chase -- Bed Forms and Resistance to Flow by Yasser Raslan -- An Examination of the Dynamic Loop Rating Curve in Alluvial Rivers by Phil G. Combs -- Scour Downstream of Hydraulic Structures by T. K. Burke -- Distorted Physical Hydraulic Models, Theory and Practice by Fred L. Ogden -- Life Expectancy of Reservoirs by T. G. Anthony Balan
Leveraging concurrency for performance and security
No full text"In this thesis we explore methods for exploiting concurrency to improve the security and performance of computing systems. We put forth four proposals: the Concurrency Accelerator (ConcAcl), Record-and-Replay Safe (RnRSafe), ReplayConfusion, and ReplayEndurance.
With ConcAcl we accelerate concurrency management operations by creating a dedicated layer that is programmed by supervisor software (e.g. Operating System kernels or multi-threading runtimes). This layer is provisioned with dedicated compute and memory resources which are replicated across all cores in a multi-core processor. ConcAcl hosts procedures which are designed to exploit this unique arrangement to accelerate synchronization-heavy operations that are critical for concurrency. We use ConcAcl to offload functions related to event-synchronization, cross-core remote procedure calls, and task scheduling.
In addition to improving concurrency management we also explore techniques which exploit concurrency to extract security benefits. The difficulty of implementing hardware-enforced security policies is exacerbated by a trade-off between implementation intrusiveness and completeness of methods. Methods which can guarantee detection will often require radical architectural changes. In addition, security systems need to be flexible, as security threats continuously evolve. To help address these requirements, we propose utilizing a novel framework where ``Record and Deterministic Replay"" (RnR) is used to {\em complement} hardware security features. We call our approach RnRSafe. By recording non-deterministic behaviors concurrent replay can be used to investigate potential alarms. Thus, RnRSafe reduces the cost of security hardware by allowing it to be less precise at detecting attacks, potentially reporting false positives. We show how RnRSafe can be used to defend against Return Oriented Programming (ROP) attacks with minimal changes to the processor architecture.
We also propose exploiting concurrent record and replay to enable the detection of otherwise undetectable covert channel attacks using two techniques -- ReplayConfusion and ReplayEndurance. %These techniques allow the detection of covert channels which flow across the Last Level Cache or across the speculative execution boundary. Covert channels encode secret values in sub-architectural features like caches and buffers. To detect covert channels we propose techniques similar to our RnR-Safe approach. First, the original instruction execution is recorded. Then, in either offline or online fashion, a replay is performed under a slightly altered configuration designed to alter sub-architectural behaviors. Thus, by comparing the original instruction execution to the modified replay-time execution, a signal can be extracted which measures the divergence between the recorded and replayed program in order to estimate the program's sensitivity to sub-architectural behaviors. With ReplayConfusion we alter parameters which organize the last-level cache and with ReplayEndurance we modify those which govern speculative execution. Altogether, this enables the construction of robust defenses against these attacks which can defend systems despite insecure hardware."Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2022-05-01The student, Yasser Shalabi, accepted the attached license on 2020-03-07 at 08:45.The student, Yasser Shalabi, submitted this Dissertation for approval on 2020-03-07 at 08:55.This Dissertation was approved for publication on 2020-03-09 at 10:36.DSpace SAF Submission Ingestion Package generated from Vireo submission #14887 on 2020-08-25 at 17:38:56Made available in DSpace on 2020-08-27T00:46:51Z (GMT). No. of bitstreams: 2
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Record and replay based virtual-machine introspection for system security
No full textHardware security features need to strike a careful balance between design intrusiveness and completeness of methods. Securing against attacks like Return Oriented Programming (ROP) requires frequent and expensive checks. Complete security defenses have been proposed yet modern systems are still vulnerable to ROP attacks. We provide complete security by decomposing the solution into two stages. The first stage raises alarms based on an imprecise, low cost hardware detector. The second stage applies complete methods in order to accurately distinguish real attacks from false alarms. This decomposition is enabled with Record and Deterministic Replay. The original execution is recorded and subjected to replay analysis as alarms are raised. In this way the Replay infrastructure can compensate for the occasional hardware imprecision.
We demonstrate this approach by applying it to thwart ROP attacks on the Linux kernel. We call the design RnR-ROPSafe. It reuses a simple Return Address Stack (RAS) as the hardware detector. The RAS is slightly modified to prevent corruption of the RAS due to multithreading and due to non-procedural returns—improving its performance as a ROP detector. Rare false positives due to underflows are eliminated via replay instead of hardware over-design. RnR-ROPSafe relies on two on-the-fly replayers: an always-on, fast Checkpointing replayer that periodically creates checkpoints, and a detailed-analysis Alarm replayer that is triggered when there is a threat alarm. We find that the first one has execution speed comparable to that of the recorder, and can be replaying all the time, while the latter has to handle only very few false positives.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2018-12-01The student, Yasser Shalabi, accepted the attached license on 2016-12-01 at 11:00.The student, Yasser Shalabi, submitted this Thesis for approval on 2016-12-01 at 11:06.This Thesis was approved for publication on 2016-12-01 at 16:31.DSpace SAF Submission Ingestion Package generated from Vireo submission #10390 on 2017-02-28 at 14:42:42Made available in DSpace on 2017-03-01T17:01:50Z (GMT). No. of bitstreams: 2
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Dynamic Modeling of a Flexible Cable with an Attached Underwater Vehicle: Design, Simulation, and Validation
No full textThis thesis investigates the dynamic behavior of underwater tethered vehicles (UTVs) through numerical simulation and experimental testing. With the goal of providing a foundational framework for modeling, analysis, and future control development. Tethered systems are increasingly utilized in marine applications, including reef monitoring and interaction with sensitive coral ecosystems.
A lumped-mass model was employed to simulate the flexible tether, capturing internal tension, hydrodynamic drag, and segment wise inertia. Two key simulation scenarios were also explored: a free-end cable subjected to towing, and a cable connected to an actively towed UTV. The model was implemented in MATLAB, and time-domain simulations were performed to evaluate cable shape, tension propagation, and vehicle pitch and yaw response.
To assess the validity of the simulation results, a small-scale open-water experiment was conducted. The experimental platform included a lightweight UUV outfitted with a strain gauge and pressure sensor. Which measured both tension and depth. Both exhibited qualitative agreement with the simulation predictions, particularly in the steady-state regime.
The study demonstrates that lumped-mass modeling can effectively represent the behavior of tethered systems in simplified towing scenarios. The results offer a validated foundation for future developments, including smart winch integration, feedback control, and deployment of UTVs in marine environments rich in biodiversity and ecological sensitivity
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