Digital Commons Network^™

Wearable Sensor-Based Walkability Assessment At Ferry Terminal Using Machine Learning: A Case Study Of Mokpo, Korea, Jungyeon Choi, Hwayoung Kim

Journal of Marine Science and Technology–Taiwan

Walkability assessments are becoming more popular, as walking offers numerous health, environmental, and economic benefits to communities. However, previous studies on ferry terminal walkability assessment have been inadequate. This study aimed to develop a wearable sensor system to automatically assess walkability at ferry terminals without conducting surveys. We applied seven machine learning (ML) classifiers to detect different walking environments, including flat ground (FG), downhill slope (DS), uphill slope (US), and uneven surface (UE). The ML models were evaluated across different combinations of classes: 2-class (FG vs. UE), 3-class (U) (FG vs. US vs. UE), 3-class (D) (FG vs. DS vs. …

Application Of Blockchain Technology In Aquaculture Management, Yu-Jen Pan, Hsin-Pei Shieh

Journal of Marine Science and Technology–Taiwan

In recent years, food safety has become a growing concern in Taiwanese society. To ensure efficient management of the supply chain within the L Aquatic Products company, it is imperative to employ reliable technical support in establishing an effective traceability management system. The traceability of products can provide managers with valuable insight into the intricacies of the supply chain. By establishing a dependable food traceability system, brand trust can be strengthened, and consumers can inquire about the movement of aquatic products within the supply chain. Blockchain technology offers features such as traceability, accountability, transparency, reliability, trust, privacy, and security, making …

Production Of Ground Granulated Blast-Furnace Slag Cement: Energy And Carbon Reduction Efficiency Of Cement-Grinding System, Kuan-Hung Lin, Chung-Chia Yang

Journal of Marine Science and Technology–Taiwan

This study used clinker, ground granulated blast-furnace slag (GGBS), and gypsum in a cement-grinding system to produce GGBS cement (GCE). Gypsum was used as the alkaline activator to modify the surface area of GCE and increase its compressive strength. The results revealed that the use of the gypsum activator and the modification of the surface area of GCE effectively increased the formerly inadequate compressive strength of GCE (GGBS > 60%) in the early stage. In addition, energy consumption data were obtained during the production of GCE and Portland cement (PCE) by the cement-grinding system. The calculations concerning the production proportions indicated …

Automatic Side-By-Side View For Web Applications That Refer To External Content, N/A

Defensive Publications Series

In many contexts, such as legal removal requests, price comparison, etc., users that view online content in a browser need to switch between a main tool (e.g., a legal removals tool) and other content (e.g., content for which a complaint is received). Such switching imposes a significant burden on the user and can lead to errors. This disclosure describes a browser extension/plug-in that provides an “in-context review” button that, upon selection by a user, opens the URL (e.g., content that is subject of a complaint) in a second browser window that is displayed adjacent to the main window, e.g., that …

Time And Context Variable Topologies (Tcvt) For Sustainability-Aware Network Operational Focus Modes, Carlos M. Pignataro, Madhan Sankaranarayanan, Nagendra Kumar Nainar, Akram Sheriff, Jaganbabu Rajamanickam

Defensive Publications Series

Techniques are presented herein that leverage the concept of Time-Variant Routing (TVR) to create time and context variable topologies (TCVTs) that offer a scalable and versatile solution for supporting a proportional response to changes in a network’s traffic levels, allowing a network operator to maximize sustainability gains in a network having variable, tidal, and periodic traffic. Aspects of the presented techniques encompass sub-topological planes (which can be made available to a topology as a function of time), network operational focus modes (which employ such planes to create objective-optimized topologies), and mappings between the two. The techniques allow an optimal set …

A Method For Frictionless Signature-Based High-Risk Permissions Management On Computing Devices And System Thereof, John Markh

Defensive Publications Series

The present disclosure provides a method for frictionless signature-based high-risk permissions management on computing devices. The method includes an onboarding process involving the inclusion of new software vendors by the OS or MDM vendor, a process that verifies vendor legitimacy and the necessity of their access to sensitive resources. During onboarding, the OS or MDM vendor generates an "upload key," securely provided to the software vendor, and an "app signing key," securely retained within the vendor's Key Management System (KMS). Further, the method includes releasing or publishing applications to a digital distribution service managed by the OS or MDM vendor …

Space Vector Pwm Technique For Three- To Seven-Phase Ac-To-Ac Power Converters: Analysis And Experimental Verifications, Essa Eddin M. Rashad,, Sherif M. Dabour,, S. M. Allam

Journal of Engineering Research

This paper presents Pulse Width Modulation (PWM) control technique for three to seven-phase ac-to-ac power converters. These proposed PWM techniques are based on Indirect Space Vector Modulation (ISVM), which model the converter as two independent stages perform rectification and inversion stages. Two schemes of ISVM are proposed. The first scheme maximizes the voltage transfer ratio (VTR) of the converter but it produces unwanted low order harmonics. The second scheme generates sinusoidal output voltage waveforms; the cost is a reduction in the VTR of this configuration in linear mode. The viability of the proposed technique is proved using experimental results.

Improving Power System Performance Using Demand-Side Management Within Smart Grids Environment, Ahmed Rifaat Azmy,, A. Barakatand,, A. Abaza

Journal of Engineering Research

This paper introduces a method to improve the performance of power systems using demand side management to overcome the problems of increasing load demand. Defining suitable demand reduction levels can cause a significant enhancement for the entire network. Therefore, the sensitivity factors related to each load centre are defined to rank the load centres according to their priority. According to these factors, the best required load reduction can be obtained at each load centre. The recommended reduction level has to ensure overcoming the problems associated with the voltage profile and transmission lines overloading due to the increase in load demand. …

Bach Array Linear Generator For Wave Energy Converters, Ahmed E. Elgebaly, , Mohamed K. El-Nemr

Journal of Engineering Research

linear generators have been proposed as a proper power takeoff system for direct-drive wave energy conversion. Coupled directly to a reciprocating wave energy device, it was declared that linear generators could be a valuable replacement for hydraulic and pneumatic systems. In this paper, the design and performance evaluation of permanent magnet linear generator that implements Halbach array arrangement is established. The designed generator is suitable for direct energy extraction from sea waves at small wave amplitude. The electromagnetic design is performed using finite element method and space harmonic analysis. A comparative study is performed between Halbach array and conventional air-cored …

Impact Of Large Penetration Of Wind Energy On The Performance Of Electric Power Systems, A. S. Zalhaf,, Ayman Hoballah,, Ahmed Rifaat Azmy

Journal of Engineering Research

Wind energy represents one of the most important renewable energy resources that can support electrical power systems. Behaviour of wind turbines following contingencies may deteriorate system stability. This requires an extensive analysis of the possible effect of wind energy on the entire power system performance. This paper investigates the effect of wind energy on power system dynamic response. This is achieved by replacing conventional generators gradually by wind turbine (WT). Also, the optimal location of WT has been determined by checking influence on steady state operation. In addition, the effect on total fuel cost is considered to determine the optimal …

Solar Energy For Seawater Desalination: Review Of Economics, Abd Elnaby Kabeel,, Emad M. S. El-Said, Essa Eddin M. Rashad

Journal of Engineering Research

Major desalination processes consume a large amount of energy derived from oil and natural gas as heat and electricity, while emitting harmful CO2. Solar desalination has emerged as a promising solar energy-powered technology for producing fresh water. This paper will provide an overview of the economics of solar desalination with an emphasis on the Saudi fact in order to estimate the economic benefits of it in comparison with other desalination systems.

Maximum Power Tracking Of A Grid-Connected Wind-Driven Brushless Doubly-Fed Reluctance Generator Using Scalar Control, Mohamed G. Mousa,, S. M. Allam,

Journal of Engineering Research

This paper presents a scalar volt per hertz (v/f) control technique for maximum power tracking of a grid-connected wind-driven Brushless Doubly-Fed Reluctance Generator (BDFRG). The proposed generator has two stator windings namely; power winding, directly connected to the grid, and control winding, connected to the grid through a bi-directional converter. The presented control technique is based on the abc-axis and dq-axis dynamic model of BDFRG. A detailed abc-axis and dq-axis dynamic model, by which the dynamic behaviour of the BDFRG can be successfully predicted under different operating conditions, is presented. In addition, a soft starting method is suggested to avoid …

Web-Based Duplicate Records Detection With Arabic Language Enhancement, Azza Abd Al-Elah Higazy,, Amany M. Sarhan,, Tarek E. El-Tobely

Journal of Engineering Research

Sharing data between organizations has growing importance in many data mining projects. Data from various heterogeneous sources often has to be linked and aggregated in order to improve data quality. The importance of data accuracy and quality has increased with the explosion of data size. The first step to ensure the data accuracy is to make sure that each real world object is represented once and only once in a certain dataset which called Duplicate Record Detection (DRD). These data inaccuracy problems exist due to due to several factors including spelling, typographical and pronunciation variation, dialects and special vowel and …

Te Integration Of Water Hydrodynamics Modelling And Remote Sensing Data To Improve The Water Circulation Of Lake Manzala, Egypt, M. A. Bek, , Sameh B. Elkafrawy, , I. S. Lowndes,, D. M. Hargreaves

Journal of Engineering Research

This paper presents the preliminary results of the application of the ocean model (FVCOM) to replicate the hydrodynamic flows experienced within Lake El-Manzala, Egypt. The construction of this model is used to characterize the ecosystem of this shallow brackish lake and assess a range of sustainable water management strategies. Lake El-Manzala is the largest of the Egyptian shallow coastal lakes on the fringe of the Mediterranean Sea. The lake currently supports 30% of the fresh water fish farm production of Egypt. In recent years the aquatic health of the lake has significantly deteriorated due to an increase in the contamination …

Behaviour Of High Strength Concrete Composite Slabs With Different End Anchorages, Emad Etman, Mohamed A. Dabaon, Ahmed M. Taha

Journal of Engineering Research

This study is performed to investigate experimentally the behaviour of steel deck composite slabs with different end anchorages. End anchorage as a type of shear connection for composite slabs plays an important role to prevent relative slip between concrete and steel deck. The presented composite slab specimens are made of high strength concrete and loaded at a specific shear span. Objectives of this study is to evaluate experimentally load carrying capacity, end slip, mode of failure, shear bond capacity, and the end anchorage contribution to the whole composite slab behaviour. Research also presents a comparison between the experimental results and …

Experimental Shear Resistance Evaluation Of Ordinary And Perfobond Y-Shaped Shear Connectors, Mohamed A. Dabaon, , M. H. El-Boghdadi, , O. F. Kharoob, , A. H. El Gendy

Journal of Engineering Research

Composite structures refer to two load carrying structural members that are integrally connected and deforming as a single unique unit using shear connectors. The use of shear connectors enhances the development of longitudinal shear forces at the steel-concrete interface. The objective of this research is to study the structural behavior of a proposed separated Y-shaped shear connector. The suggested investigated Y-shaped shear connector is intended to be an improvement to the structural response of the conventional perfobond shear connector. Accordingly, this paper carries out six push-out tests on the separated Y-shaped shear connector according to EC4. The experimental work is …

Behavior Of Reinforced Concrete Continuous Beams Strenghened With Near Surface Mounted Reinforcement, A. Khalil, , Emad Etman,, A. H. El-Masry

Journal of Engineering Research

Using Near Surface Mounted (NSM) technique for flexural strengthening of reinforced concrete continuous beams became particularly attractive for researchers and applicators. Due to the existence of carbon fiber reinforced polymer (CFRP)laminates as external strengthening it is subjected to severe damage resulting from mechanical and environmental conditions. There is limited experimental work investigating the behavior of reinforced concrete continuous beams strengthened using NSM technique.This paper presents an experimental investigation of the behavior of reinforced concrete continuous beams strengthened with near surface mounted (NSM) technique in the hogging and sagging moment region. The main variable was changing the lengths of the NSM …

Neural Networking Of Infilled Rc Low-Rise Service Buildings, K. Abou El-Ftooh, A. Seleemah, A. Atta,, S. Taher

Journal of Engineering Research

Artificial neural networks (ANNs) are one of the most research areas that attracts the attention of experts of various scientific areas. Recent research activities regarding ANNs indicated that this method is a powerful tool to solve complicated problems in engineering fields.In this paper, ANNs were utilized to predict the lateral behavior of school buildings in Egypt. For this, reinforced concrete (RC) frames representing common school buildings with different characteristics were analyzed using nonlinear dynamic pushover analysis to obtain their capacity curves, failure loads and displacements. Parameters included number of stories, location and dimensions of the frames, distribution of masonry infill …

Limit Equilbrium Safety Analysis Of Pile In Lateral Spread: Three-Layer, Reda Farag

Journal of Engineering Research

The large amount of uncertainties in liquefaction-induced lateral spreading particularly leads to pile damage after many earthquakes. This paper presents a simplified safety analysis method of the single piles subjected to lateral spread in three layered soils. With the suggested method the analyst can get a quick estimate of the pile safety using few simulations of the pile-soil structural model. The method integrates a limit equilibrium-based finite element model with the response surface method as well as the first or the second order reliability method (FORM/SORM). In the finite element model, the assumptions of limit equilibrium method are simply applied. …

Seismic Base Isolation For Reducing Seismic Risk Of Architectural Heritage Buildings, Vojko Kilar, , Ahmed Atta, , Hamdy Afefy, Mohamed Ellithy

Journal of Engineering Research

The paper analyses the applicability of seismic base isolation made of elastomeric bearings for the seismic mitigation of architectural heritage buildings. Due to the inestimable cultural and historical significance any remedial measures into such objects must be selected with care and are usually very limited. In an ideal situation only interventions with minimum visual impacts on the object and maximum potential for restoring its cultural values would be implemented. Historical structures were usually not designed accounting seismic hazard and might be seismically more vulnerable as modern buildings. The paper deals with seismic base isolation as a technique for increasing the …

Advantages Of Geosynthetics Over Natural Materials In Landfills With Composite Liner Systems, Kent Von Maubeuge, Stephan Westhus, , Pascal Bretin

Journal of Engineering Research

Geosynthetics have been used in civil and environmental applications for many decades. Primarily functions include separation, filtration, drainage, reinforcement, protection and sealing. The decades have been witness to the most significant advances in geosynthetic design, manufacturing and installation techniques.Beyond the basic awareness of the available products, the marked increased use of geosynthetics as a whole appears to have been driven by the many advantages geosynthetics have over traditional construction methods and materials. Advantages include the direct material cost savings, airspace savings for landfills, the reduction of excavation volumes, faster installation rates, improved performance as well as the possibility of steeper …

Experimental Study On Corrosion Monitoring And Assessment Of Concrete Structures Using Acoustic Emission, Ahmed A. A. Abouhussien, Assem A. A. Hassan

Journal of Engineering Research

This paper aims to employ acoustic emission (AE) technique to detect and identify the level of damage resulting from reinforcing steel corrosion in reinforced concrete structures. Five reinforced concrete prism samples with a constant concrete cover (20 mm) were subjected to an accelerated corrosion test. The samples were corroded until reaching five different levels of theoretical mass loss: 1, 2, 3, 4 and 5% calculated using Faraday’s law. The corrosion activity of the five samples was continuously monitored using attached AE sensors and a data acquisition system. The acquired AE signal parameters including AE signal strength, counts, energy, and number …

Experimental Study Of Rc Exterior Beam-Column Joint Subjected To Torsional Moment, Tarek El-Shafiey, , Simon Petrvočič

Journal of Engineering Research

This paper presents the results of an experimental program conducted in order to investigate the behavior of Type-I beam-column Joints, where the beam was subjected to shear stresses due to combined effect of shear force and torsional moment (beam eccentric loading). Four beam-column joint specimens were constructed and tested up to failure in order to better understand the complicated behaviour due to combined loading transmitted from the beam to the column. The studied parameters were the configuration of beam side and secondary reinforcement and the existence of the joint reinforcing stirrups. Generally, the shear failure at the beam zone or …

Influence Of Well Location On Drawdown In Area Surrounded By Vertical Cutoff Walls, D R. Mohamed, M M. Shahien, H. H. Hafez

Journal of Engineering Research

Dewatering systems with vertical partially penetrating cutoff walls are usually used in the case of deep excavation for side support system and further increases the efficiency of the groundwater control system. In this study a parametric analysis was carried out using the finite difference software VISUAL MODFLOW4.2® to study the effect of placing a deep well at different locations inside the excavated area surrounded by impervious wall on drawdown results. The dewatering system under consideration consists of a single partially penetrating deep well having a penetration depth (lw) and well yield (Q). The well is located at variable distances from …

Recycling Local Industrial Wastes For Production Of Green Construction Materials, Alaa El-Din Sharkawi

Journal of Engineering Research

Industrial waste is one of the most important sources of environmental pollution in the world and Egypt. Providing economic opportunities for recycling these wastes represent an essential solution to this problem to encourage waste producers to dispose it safely and to provide an added value for these wastes. This research work will study the feasibility of recycling certain industrial wastes for production low-cost building materials and improving the soil compaction characteristics. In this research work, the efficiency of recycling some common local industrial wastes in production of construction materials was explored. The selected wastes include cement kiln dust (i.e. bypass) …

Multi-Objective Strategy For Optimizing Repetitive Construction Projects Using Linear Programming Models, Sherif M. Hafez, Enas S. Morgan, Mohamed A. Hamad

Journal of Engineering Research

Decision making has become much more complicated than in the past due to increased decision alternatives, uncertainty, and cost of making errors. As a result, it is very difficult to rely on a trial and error approach in decision making. Nowadays business managers are dealing with different types of projects ranging from implementing a large scale manufacturing plant to a simple sales campaign. While dealing with projects, to become competitive, sometimes it is required to complete a project within the predetermined deadline to keep cost at lowest possible level. Failure to do so ultimately leads to increase in total cost. …

Awareness Of Cybersecurity And Its Relationship To Digital Transformation Among Supervisors Of The Education Department In Jazan Region, Maryam Y. Otaif

International Journal for Research in Education

The study aimed to identify the degree of awareness of cybersecurity, and to reveal the reality of digital transformation and the relationship between them from the point of view of the supervisors of the Education Department in the Jazan region. The study followed the descriptive correlative approach, by stratified random sampling (257). a questionnaire was built , The study found that the degree of cybersecurity awareness is high with an arithmetic mean of (3.48), and also degree of awareness of cybersecurity concepts is high, (3,52), and awareness of cybersecurity risks and violations (3.45), and it was found that the total …

Implementation And Evaluation Of A Pain Assessment Tool In A Dementia Care Facility: A Quality Improvement Project, Cynthia A. Carbo

Dissertations

Pain has been under-detected and under-treated in patients with dementia. Signs of distress can be misinterpreted in this population, and patients can be inappropriately given psychotropic medication. Various pain assessment tools for patients with moderate to severe dementia have been devised, and all require further study.

The purpose of this evidence-based project was the selection of a pain assessment tool, training of staff in pain management and tool use in a dementia care facility, and monitoring of pain assessment to comply with regulatory guidelines. Benzodiazepine and neuroleptic doses per patient were monitored before and after the training intervention in an …

Cover And Contents

Turkish Journal of Physics

No abstract provided.

Improved Cardiac Function In Postischemic Rats Using An Optimized Cardiac Reprogramming Cocktail Delivered In A Single Novel Adeno-Associated Virus, Huanyu Zhou, Jin Yang, Chetan Srinath, Aliya Zeng, Iris Wu, Elena C Leon, Tawny Neal Qureshi, Christopher A Reid, Emily R Nettesheim, Emma Xu, Zoe Duclos, Tamer M A Mohamed, Farshad Farshidfar, Anthony Fejes, Jun Liu, Samantha Jones, Charles Feathers, Tae Won Chung, Frank Jing, William S Prince, Jianmin Lin, Pengzhi Yu, Deepak Srivastava, Timothy Hoey, Kathryn N Ivey, Laura M Lombardi

Faculty, Staff and Students Publications

Background: Cardiac reprogramming is a technique to directly convert nonmyocytes into myocardial cells using genes or small molecules. This intervention provides functional benefit to the rodent heart when delivered at the time of myocardial infarction or activated transgenically up to 4 weeks after myocardial infarction. Yet, several hurdles have prevented the advancement of cardiac reprogramming for clinical use.

Methods: Through a combination of screening and rational design, we identified a cardiac reprogramming cocktail that can be encoded in a single adeno-associated virus. We also created a novel adeno-associated virus capsid that can transduce cardiac fibroblasts more efficiently than available parental …