Digital Commons Network^™

Open-Source Based Testbed For Multioperator 4g/5g Infrastructure Sharing In Virtual Environments, Ricardo Marco Alaez, Jose M. Alcaraz Calero, Qi Wang, Fatna Belqasmi, May El Barachi, Mohamad Badra, Omar Alfandi

All Works

© 2017 Ricardo Marco Alaez et al. Fourth-Generation (4G) mobile networks are based on Long-Term Evolution (LTE) technologies and are being deployed worldwide, while research on further evolution towards the Fifth Generation (5G) has been recently initiated. 5G will be featured with advanced network infrastructure sharing capabilities among different operators. Therefore, an open-source implementation of 4G/5G networks with this capability is crucial to enable early research in this area. The main contribution of this paper is the design and implementation of such a 4G/5G open-source testbed to investigate multioperator infrastructure sharing capabilities executed in virtual architectures. The proposed design and …

Antecedents And Consequences Of Private Label Brand Attitude In The Egyptian Retailers, Madiha Metawie, Reham Ibrahim Elseidi

Business Administration

The importance of private label brands has increased; several factors have been affecting the attitude towards private label brands. This research examines the relationship between the antecedents and consequences of private label attitude. A structural model is developed using AMOS version 22, and tested providing indications for the factors affecting the attitude towards private label brands. The results from the structural equation model explained the relationships between store image, familiarity with private label brands, price consciousness, quality consciousness, national brand loyalty and store loyalty on private label attitude. The findings revealed that six hypotheses were accepted and only one had …

Enabling Sustainable Bulk Transfer In Environmentally-Powered Wireless Sensor Networks, Alvin C. Valera, Wee-Seng Soh, Hwee-Pink Tan

Research Collection School Of Computing and Information Systems

We address the problem of transferring bulk data in environmentally-powered wireless sensor networks where duty cycle compliance is critical for their uninterrupted operation. We propose Pump-and-Nap, a packet train forwarding technique that maximizes throughput while simultaneously enforcing compliance to dynamic duty cycle limitations. A node using Pump-and-Nap operates by pumping a train of packets followed by a napping period where the node forgoes any transmission. Pump-and-Nap employs an adaptive controller to periodically compute the optimal capacity, that is, the maximum number of packets a node can receive and transmit in a train, given its duty cycle constraint. The controller uses …

Online Hacker Forum Censorship: Would Banning The Bad Guys Attract Good Guys?, Qiu-Hong Wang, Le-Ting Zhang, Meng-Ke Qiao

Research Collection School Of Computing and Information Systems

To tackle the ubiquitous cybersecurity threats, a few countries have enacted legislation to criminalize the production, distribution and possession of computer misuse tools. Consequently, online hacker forums, which enable the provision and dissemination of malicious cyber-attack techniques among potential hackers or technology-savvy users, are subject to censorship. This project examines the mixed impacts of online hacker forum censorship on users’ contribution to protection discussion through a natural experiment with large-scale content analysis. We find that while the enforcement indeed reduced the discussion on malicious cyber-attacks, the discussion on cybersecurity protection could increase or decrease in different scenarios. The rationale is …

Exploring Representativeness And Informativeness For Active Learning, Bo Du, Zengmao Wang, Lefei Zhang, Liangpei Zhang, Wei Liu, Jialie Shen, Dacheng Tao

Research Collection School Of Computing and Information Systems

How can we find a general way to choose the most suitable samples for training a classifier? Even with very limited prior information? Active learning, which can be regarded as an iterative optimization procedure, plays a key role to construct a refined training set to improve the classification performance in a variety of applications, such as text analysis, image recognition, social network modeling, etc. Although combining representativeness and informativeness of samples has been proven promising for active sampling, state-of-the-art methods perform well under certain data structures. Then can we find a way to fuse the two active sampling criteria without …

Sensor-Driven Detection Of Social Isolation In Community-Dwelling Elderly, W K P Neranjana Nadee Rodrigo Goonawardene, Xiaoping Toh, Hwee-Pink Tan

Research Collection School Of Computing and Information Systems

Ageing-in-place, the ability to age holistically in the community, is increasingly gaining recognition as a solution to address resource limitations in the elderly care sector. Effective elderly care models require a personalised and all-encompassing approach to caregiving. In this regard, sensor technologies have gained attention as an effective means to monitor the wellbeing of elderly living alone. In this study, we seek to investigate the potential of non-intrusive sensor systems to detect socially isolated community dwelling elderly. Using a mixed method approach, our results showed that sensor-derived features such as going-out behavior, daytime napping and time spent in the living …

Safestack+: Enhanced Dual Stack To Combat Data-Flow Hijacking, Yan Lin, Xiaoxiao Tang, Debin Gao

Research Collection School Of Computing and Information Systems

SafeStack, initially proposed as a key component of Code Pointer Integrity (CPI), separates the program stack into two distinct regions to provide a safe region for sensitive code pointers. SafeStack can prevent buffer overflow attacks that overwrite sensitive code pointers, e.g., return addresses, to hijack control flow of the program, and has been incorporated into the Clang project of LLVM as a C-based language front-end. In this paper, we propose and implement SafeStack+, an enhanced dual stack LLVM plug-in that further protects programs from data-flow hijacking. SafeStack+ locates data flow sensitive variables on the unsafe stack that could potentially affect …

Infrastructure, Trade Facilitation, And Network Connectivity In Sub-Saharan Africa☆,☆☆, Ben Shepherd

Journal of African Trade

This paper uses new measures of value added in exports in two sectors (textiles and clothing, and agriculture) to examine the linkages between trade facilitation and infrastructure on the one hand, and value chain participation on the other. It applies network analysis methods to derive a summary measure of value chain connectivity for 189 countries, including 44 in Sub-Saharan Africa. There is a statistically significant association between this measure and summary indicators of infrastructure development and trade facilitation performance. Moreover, it is not only a country's own performance that matters, but also that of its neighbors. The regional dimension of …

Trade And Economic Growth In Developing Countries: Evidence From Sub-Saharan Africa, Pam Zahonogo

Journal of African Trade

This study investigates how trade openness affects economic growth in developing countries, with a focus on sub-Saharan Africa (SSA). We use a dynamic growth model with data from 42 SSA countries covering 1980 to 2012. We employ the Pooled Mean Group estimation technique, which is appropriate for drawing conclusions from dynamic heterogeneous panels by considering long-run equilibrium relations. The empirical evidence indicates that a trade threshold exists below which greater trade openness has beneficial effects on economic growth and above which the trade effect on growth declines. The evidence also indicates an inverted U-curve (Laffer Curve of Trade) response, robust …

Screening Guidelines And Data Analysis For The Application Of In-Situ Polymer Gels For Injection Well Conformance Improvement, Munqith Naeem Rashak Aldhaheri

Doctoral Dissertations

"Excessive water production represents a major industry challenge because of its serious economic and environmental impacts. Polymer gels have been effectively applied to mitigate water production and extend the productive lives of mature oilfields. However, selecting a proper gel technology for a given reservoir is a challenging task for reservoir engineers because of the associated geological and technical complexities and the absence of efficient screening tools.

A comprehensive review for the worldwide gel field projects was conducted to develop an integrated systematic methodology that determines the applicability of three injection well gel technologies including bulk gels, colloidal dispersion gels, and …

Additive Manufacturing Of Glass Using A Filament Fed Process, Junjie Luo

Doctoral Dissertations

"There are many scientific and engineering applications of glass including optics, communications, electronics, and hermetic seals, there has been minimal research towards the Additive Manufacturing (AM) of transparent glass parts. The special thermal and optical properties of glasses make them hard to be printed using conventional AM techniques. In this dissertation, two different AM techniques for glass AM were developed, Selective Laser Melting (SLM) and filament fed process.

Semi-transparent parts were printed with SLM process. However, the filament fed process was found to be more robust and promising for printing optically transparent glass parts. Therefore, this dissertation is focused on …

Optimal Electric Vehicle Scheduling : A Co-Optimized System And Customer Perspective, Maigha

Doctoral Dissertations

"Electric vehicles provide a two pronged solution to the problems faced by the electricity and transportation sectors. They provide a green, highly efficient alternative to the internal combustion engine vehicles, thus reducing our dependence on fossil fuels. Secondly, they bear the potential of supporting the grid as energy storage devices while incentivizing the customers through their participation in energy markets. Despite these advantages, widespread adoption of electric vehicles faces socio-technical and economic bottleneck. This dissertation seeks to provide solutions that balance system and customer objectives under present technological capabilities. The research uses electric vehicles as controllable loads and resources. The …

Pillar Design For St. Peter Sandstone Formation, Francis Anohomah Arthur

Doctoral Dissertations

"Silica sands produced primarily from St. Peter Sandstone are used for hydraulic fracturing in the petroleum industry, glassmaking, chemicals, ceramics, filtration and the foundry industry in the US. The recent high demand for silica sands for hydraulic fracturing has triggered increased production and commissioning of new silica sand mines to support natural gas production from shale and tight gas deposits in the US. Most mines use surface mining methods to extract St. Peter Sandstone. The room and pillar mining method has been successfully used for St. Peter Sandstone mining in a few US locations, however, no one has proposed a …

A University For All Ages? An Exploration Of Age-Stereotyping And Unconscious Bias And Its Impact On The Student Experience., Marie Lavelle, Cath Gristy, Joanna Haynes

School of Law, Humanities and Social Sciences

Aims of project:  To explore aspects of age stereotyping and age related unconscious bias on the multi-age site of Plymouth University campus.  To investigate ways in which members of the PU community experience and express understandings of age.  To explore how conceptions and expectations of age are shaped by the informal environment and practices, particularly those practices related to joining and becoming a member of the university community. Background/context to project: The University might be considered a space associated with ‘being’ a certain age, constructed not just with learning in mind but also a space where rites …

Analyzing The Rio Chama Flow Project’S Capacity To Implement Adaptive Management, Avery Olshefski

Water Resources Professional Project Reports

The Rio Chama is the main tributary to the Rio Grande in New Mexico. Several reservoirs were built on the Rio Chama to store water for downstream users, which has led to the river section becoming highly managed, resulting in negative ecological effects. Approximately 400,000 AF per year of water is conveyed through the system without considerable consumptive amounts, 96,200 AF of which were added with the San Juan-Chama trans-basin diversion, creating more water in the system then historically available. Therefore, the flow between the El Vado and Abiquiu Reservoirs has the potential to be optimized in order to provide …

Swmp Plan 2017, U.S. Department Of Energy, National Technology & Engineering Solutions Of Sandia, Llc

Municipal Separate Storm Sewer System (MS4) Permit

No abstract provided.

Lipoma Of The Tendon Sheath Causing Symptoms Of De Quervain’S Tenosynovitis: A Case Report, James Rose, Moheb S. Moneim

UNM Orthopaedic Research Journal

Deep lipomas arising from the extensor compartments of the wrist are extremely rare. Owing to infrequent presentation and mass effect on nearby structures, lipomas can be mistaken for other clinical entities. We describe a 70-year-old woman who presented to our clinic with symptoms initially suggestive of de Quervain’s tenosynovitis of the left wrist. However, findings of physical examinations and imaging techniques revealed a lipoma of the tendon sheath of the second dorsal compartment. The patient was successfully treated operatively, with excision and release of the first dorsal compartment. To help accurately diagnosis and treat lipomas of the wrist in deep-tissue …

Capitate Stress Injuries Of Both Wrists In An Adolescent Female Gymnast: A Case Report, Brynne R.W Latterell, Deana M. Mercer, Shane P. Cass, Christopher A. Mcgrew

UNM Orthopaedic Research Journal

Gymnastic activities expose the wrist to a wide variety of overuse and acute stresses. Injuries to the distal radius are the most commonly reported gymnastic wrist condition; however, many other structures are at risk of injury from the sport’s high acute and overuse demands, including the carpal bones, most commonly the scaphoid. We describe a 17-year-old female, high-level gymnast in whom stress injuries to both capitate bones were ultimately diagnosed after initial symptoms of pain. This case demonstrated the need for prompt recognition, without which much chronic and debilitating injury would develop. For successful diagnosis, healthcare providers should carefully examine …

Diagnosing An Acute Quadratus Plantae Tear In A 37-Year-Old Athlete: A Case Report, James P. Toldi, Shane P. Cass, Richard A. Miller, Christopher A. Mcgrew

UNM Orthopaedic Research Journal

Foot injuries occur frequently in distance runners and can notably impact training performance. Common diagnoses include plantar fasciitis, tendinopathies of the forefoot or midfoot, and stress fractures of the metatarsals. Occasionally, more obscure structures may be involved. We describe a 37-year-old male distance runner who presented with symptoms of heel pain and ecchymosis, suggesting an acute plantar fascia injury. However, findings of magnetic resonance imaging revealed a tear to the quadratus plantae (QP). The patient gradually returned to normal levels of physical activity, with complete resolution of symptoms by 4 months after the initial injury. Healthcare providers should be aware …

Rare Tumors Adjacent To The Achilles Tendon: Report Of Two Cases, Jay J. Wojcik, Aditi S. Majumdar, Kathleen M. Madden, Richard A. Miller

UNM Orthopaedic Research Journal

Benign masses are not uncommon near the Achilles tendon of the ankle. However, the occurrence of angiomyomas or glomus tumors in the region has rarely been reported. We describe two patients, a 44-year-old woman and 44-yearold man, who presented with a tender mass posterior to the Achilles tendon. Excision led to successful removal of the lesion in both cases. Results of histological examinations revealed an angiomyoma and glomus tumor in the woman and man, respectively. Although rare, the presence of these tumors should be considered in the differential diagnosis of masses near the Achilles tendon.

A New Diagnosis Of Multiple Sclerosis In A 29-Year-Old Former Collegiate Basketball Player With Initial Symptoms Of Recurrent Bell’S Palsy: A Case Report, Eric R. Reynolds, Andrew D. Ashbaugh, Christopher A. Mcgrew

UNM Orthopaedic Research Journal

Multiple sclerosis (MS) is a demyelinating disorder of the central nervous system, characterized by immunemediated destruction of myelinated axons, which leads to notable physical disability. Although presence among active athletes is extremely low, it can cause considerable lifestyle changes for those athletes affected as they transition into life after competitive athletics. We describe a 29-year-old former collegiate women’s basketball player in whom MS was diagnosed during a visit for recurrent evaluation of Bell palsy. Subsequent neurology consult and magnetic resonance imaging led to the confirmation of the diagnosis of MS, and the patient began treatment for relapsing-remitting MS. During visits …

The Albuquerque Community Sports Medicine Experience: Four Decades And Counting, Christopher A. Mcgrew, Thomas A. Decoster, Shane P. Cass, Richard Gerrells, Edward R. Sweetser

UNM Orthopaedic Research Journal

No abstract provided.

Posttraumatic Attenuation Of The Lisfranc Ligament In A 14-Year-Old Athlete: A Case Report, Paul J. Johnson, David M. Bennett

UNM Orthopaedic Research Journal

Lisfranc injuries in children are rare and range from mild midfoot sprains to severe traumatic fracture-dislocations. Management of sprains is nonoperative, whereas treatment of fracture-dislocations often requires internal fixation. We present a unique case of a midfoot sprain in a 14-year-old adolescent boy, with gradual increased instability at the joint owing to attenuation of the Lisfranc ligament. Closed reduction and percutaneous pinning resulted in successful treatment at 3 weeks postoperatively. Midfoot sprains may lead to further ligamentous attenuation and widening as seen on radiographs and thus should be monitored for signs of persistent pain and instability. Because midfoot instability contributes …

Missed Early Glenohumeral Septic Arthritis During Emergency Department Visit Owing To Low Virulence Streptococcus Mitis: A Case Report, Ashley A. Crum, Christopher A. Mcgrew, Matthew A. Tennison

UNM Orthopaedic Research Journal

Glenohumeral joint septic arthritis in a native joint is uncommon but can be debilitating if not treated early. Septic arthritis does not always present with the typical clinical findings, especially in immunocompromised patients. We report a rare case of glenohumeral septic arthritis from Streptococcus mitis infection in a diabetic woman that was initially missed on first presentation in the emergency department (ED). The exact cause of infection in this case remains unclear but is likely due to poor dentition and possible transient bacteremia in the setting of large rotator cuff tear in an immunocompromised patient (diabetes). The patient had a …

Front Matter, Unm Department Of Orthopaedic Surgery

UNM Orthopaedic Research Journal

No abstract provided.

Physical Therapy Faculty, Unm Department Of Orthopaedic Surgery

UNM Orthopaedic Research Journal

No abstract provided.

Letter From The Chair, Unm Department Of Orthopaedic Surgery

UNM Orthopaedic Research Journal

No abstract provided.

Letter From The Chief Of The Division Of Physical Therapy, Unm Department Of Orthopaedic Surgery

UNM Orthopaedic Research Journal

No abstract provided.

Letter From The Residency Director, Unm Department Of Orthopaedic Surgery

UNM Orthopaedic Research Journal

No abstract provided.

Value-Based Bundled Repayment In Total Joint Arthroplasty, Michael M. Decker

UNM Orthopaedic Research Journal

The United States continues to spend an unprecedented amount of annual money on healthcare. However, the costs of providing care may not appropriately reflect the quality of care patients are receiving. This is particularly concerning when examining the projected increase in total joint arthroplasty (TJA) procedures over the next few decades, which are expected to increase to nearly 4 million procedures annually. The Center for Medicare and Medicaid Services (CMS) has responded by increasingly shifting reimbursements from the less efficient fee-forservice repayment model to value-based repayment. The Comprehensive Care for Joint Replacement (CJR) bundle payment model has recently been implemented …