bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study the effect of recycled pressurized air on oxygen transfer design parameters in sequencing batch reactor technology
Authors: Elkaramany Hesham M. , Elbaz Amro A. , Mohamed Amal N. , Sakr Alhassan H. 
Published: November 2016

AbstractAeration process consumes more than 60% of the total energy required for wastewater treatment. The present study aims to save power consumption within wastewater treatment aeration process through recycling of the air flow. A new technique of aeration is used to increase oxygen transfer efficiency via exploiting recycled pressurized air. A pilot plant has been constructed to study the effect of using recycled pressurized air within sequencing batch reactor (SBR) model. The results showed that the new technique comparing with the conventional SBR model improved Standard oxygen transfer rate (SORT), Standard oxygen transfer efficiency (SOTE) and Standard aeration efficiency (SAE). In particular, the new technique enhanced (SAE) with 10 and 4% at gauge pressure values 0.5 atm. and 2 atm. respectively. On the other hand, intermittent aeration enhanced (SAE) with 15 and 5% at gauge pressure values 0.5 atm. and 2 atm. respectively.
SCIENCE, RELIGION, AND THE MEANING OF LIFE AND THE UNIVERSE: “AMALGAM” NARRATIVES OF POLISH NATURAL SCIENTISTS
Authors: Rogińska Maria 
Published: November 2016

AbstractThis article deals with phenomena occurring at the interface of the existential, the religious, and scientific inquiry. On the basis of in‐depth interviews with Polish physicists and biologists, I examine the role that science and religion play in their narrative of the meaning of the Universe and human life. I show that the narratives about meaning have a system‐related (“amalgam") character that is associated with responses to adjacent metaphysical questions, including those based on scientific knowledge. I reconstruct the typical amalgam questions of Polish scientists and come to a conclusion about the stability of religious and nonreligious amalgams in this group. Critically referring to the thesis concerning the secularizing impact of science, I conclude that science by itself does not have a destructive effect on Polish scientists’ confidence that life and the Universe are meaningful, but is rather an exacerbating factor of the existing worldview system.
THE HUMAN HEARTH AND THE DAWN OF MORALITY
Authors: Rappaport Margaret Boone , Corbally Christopher 
Published: November 2016

AbstractStunned by the implications of Colagè's analysis of the cultural activation of the brain's Visual Word Form Area and the potential role of cultural neural reuse in the evolution of biology and culture, the authors build on his work in proposing a context for the first rudimentary hominin moral systems. They cross‐reference six domains: neuroscience on sleep, creativity, plasticity, and the Left Hemisphere Interpreter; palaeobiology; cognitive science; philosophy; traditional archaeology; and cognitive archaeology's theories on sleep changes in Homo erectus and consequences for later humans. The authors hypothesize that the human genome, when analyzed with findings from neuroscience and cognitive science, will confirm the evolutionary timing of an internal running monologue and other neural components that constitute moral decision making. The authors rely on practical modern philosophers to identify continuities with earlier primates, and one major discontinuity—some bright white moral line that may have been crossed more than once during the long and successful tenure of Homo erectus on Earth.
A CRITIQUE OF EMERGENT THEOLOGIES
Authors: Leidenhag Joanna 
Published: November 2016

AbstractThis article is an analysis and critique of emergent theologies, focusing on areas of Christology and pneumatology. An increasing number of Christian theologians are integrating (strong) emergence theory into their work. I argue that, despite the range of theological commitments and methodological approaches represented by these scholars, each faces similar problematic tendencies when their Christian doctrines are combined with (strong) emergence theory. It is concluded that the basic logic of emergence theory, whereby matter is seen to precede mind, makes it difficult for emergent theologies to offer an account of salvation, avoid significant issues regarding God's involvement with evil, and maintain divine transcendence. It is concluded, therefore, that Christian theology should look elsewhere for a complementary metaphysical framework with which to bridge scientific and theological discourse.
SCIENTISTS IN THE COSMOS: AN EXISTENTIAL APPROACH TO THE DEBATE BETWEEN SCIENCE AND RELIGION
Authors: Ake Stacey E. 
Published: November 2016

AbstractWalker Percy's use of the terms Umwelt (environment) and Welt (symbol world) as well as his separation of events into dyadic and triadic ones, where the latter involve human beings, is brought to bear on the relationship between science and religion with the upshot being that science (a dyadic enterprise) is not equipped to really understand or explain triadic entities (namely, human beings).
WALKER PERCY, LANGUAGE, AND HOMO SINGULARIS
Authors: Sykes John D. 
Published: November 2016

AbstractThe novelist Walker Percy argued that modern science has a tremendous blind spot in its view of human nature. Unlike purely physical phenomena, which can be explained by the interaction of dyadic relationships, human beings must also be understood in terms of triadic relationships brought into being by symbolic language. The self brought into being by symbolic language is nonmaterial but real, and operates by different “laws” than those that govern dyadic relations. In making this case, Percy drew a sharp line between human and nonhuman language, a line that more recent developments in science has challenged. However, Percy's central point, that the agent of symbolic language cannot be understood within a materialist framework, remains valid.
FOULING EFFECT ON CONTROLLER TUNING IN MEMBRANE BIOREACTOR FILTRATION PROCESS
Authors: Yusuf Zakariah , Abdul Wahab Norhaliza 
Published: November 2016

This paper presents an initial investigation on controller tuning with the effect on membrane fouling in submerged membrane bioreactor (SMBR). This work employed proportional integral derivative (PID) controller to control SMBR filtration process. The PID controller is tuned using three different methods which are Ziegler Nichols (ZN), Cohen Coon (CC) and integral time-weight absolute error (ITAE) tuning. The PID controller is used to control the SMBR filtration permeate flux. Transmembrane pressure (TMP) was observed during the filtration process that will determine fouling effect on controller tuning. The simulation work is done using artificial neural network (ANN) model that was developed in our previous work. Different set points were tested to see the robustness of the controller tuning. The overall result shows the ITAE tuning method performs better compare with other tuning methods in term of its overshoot, settling time and integral absolute error (IAE) with 0.66%, 9.1 second and 82.68 respectively. This tuning method provides precise control performance in the same time it will prevent from decrement of flux in the filtration cycle.
FORMULATION OF HYBRID MEMBRANE LAYER BY USING PVA/CHITOSAN BLENDED POLYMERS ON POROUS POLYSULFONE SUPPORT, AND THE APPLICATION ON COPPER ION REMOVAL
Authors: Sulaiman Nurul Aida , Kassim Shaari Norin Zamiah , Abd Rahman Norazah , Abd Fathel Mohammad Hafizh , Elangko Aqila Zulaikha Nazreen 
Published: November 2016

In this study, a thin film composite membrane was fabricated by using hybrid membrane as the barrier layer and polysulfone membrane as base membrane. During the formulation of hybrid membrane, a polymer blend of polyvinyl alcohol with chitosan was chosen as organic polymer and it was cross-linked with tetraethylorthosilicate (TEOS), where sol gel method is used to prepare the hybrid membrane. Phase inversion method is used to prepare the base membrane. The aim of this study is to determine the optimum concentration of the polymer for porous support membrane as well as the concentration of chitosan and TEOS in the fabrication of the thin film composite. Four concentrations of polysulfone (PSF) solution was prepared (13wt%, 14wt%, 15wt% and 17wt %) and the optimum concentration was determined. For the hybrid membrane, concentration of chitosan solution was varied at1wt%, 2wt% and 3wt% with fixed concentration of polyvinyl alcohol (PVA) solution (10wt %). Results showed that 2wt% chitosan and 13 wt% PSF is sufficient to remove acceptable percentage of copper ion. For this purpose of identifying optimum amount of TEOS, pH of the feed copper ion solution was adjusted to three conditions (pH 3, 7, 10). Although, the percentage removal is highest at pH 10 but when dealing with natural integrated complexation method, pH 7 is found to be the optimum pH for the removal of copper ion. Besides that, 3 wt% TEOS in hybrid membrane has found to give a remarkable percentage removal of copper ion. Overall, a new formulation of thin film composite membrane show a great potential to compete with those commercial membrane in thin film composite membrane application especially separation process.
A Comparison of 1D-3D Co-Simulation and Transient 3D Simulation for EGR Distribution Studies
Authors: Dimitriou P. , Avola C. , Burke R. , Copeland C. , Turner N. 
Published: December 2016

Computational modeling, an important task for design, research and development stages, is evolving fast with the increase of computational capabilities over the last decades. One-dimensional (1D) CFD simulation is commonly used to analyze the flow rates and pressures of an entire fluid system of interconnected parts such as pipes, junctions, valves, and pumps. In contrast, three-dimensional (3D) CFD simulation allows detailed modeling of components such as manifolds, heat exchangers, and combustion cylinders where the flow contains significant 3D effects. Coupling a 1D model with a 3D domain potentially offers the benefits of both simulation strategies in one co-simulation approach.
The present study provides a deep understanding of the co-simulation approach by listing all necessary steps need to be followed before and during the coupling of the 1D and 3D simulation software. It analyses the simulation and convergence time requirements based on the 3D model mesh quality and compares this approach with the current 1D–3D uncoupled approach followed in the industry. The outputs of both simulation approaches are then compared with experimental results.
The co-simulation time mainly depends on the mesh quality of the 3D domain and the number of inner iterations per time-step which is entirely determined by the nature and complexity of the simulation. The co-simulation time per engine cycle is almost identical to the uncoupled approach. However, it was found that the number of cycles required for convergence in the coupled approach is nearly double than the uncoupled approach. The comparison between the two simulation approaches and the experimental results demonstrated the very 3D nature of the flows, the sensitivity of the uncoupled approach to input conditions and the sensitivity of co-simulation to the averaged boundary conditions transferred from the 1D model back to the 3D domain.
Combustion Characteristics of Methane Direct Injection Engine Under Various Injection Timings and Injection Pressures
Authors: Song Jingeun , Choi Mingi , Kim Daesik , Park Sungwook 
Published: December 2016

The performance of a methane direct injection engine was investigated under various fuel injection timings and injection pressures. A single-cylinder optical engine was used to acquire in-cylinder pressure data and flame images. An outward-opening injector was installed at the center of the cylinder head.
Experimental results showed that the combustion characteristics were strongly influenced by the end of injection timing rather than the start of injection timing. Late injection enhanced the combustion speed because the short duration between the end of injection and the spark induced strong turbulence. The flame propagation speeds under various injection timings were directly compared using crank-angle-resolved sequential flame images. The injection pressure was not an important factor in the combustion; the three injection pressure cases of 0.5, 0.8, and 1.1 MPa yielded similar combustion trends. In the cases of late injection, the injection timings of which were near the Intake Valve Closing (IVC) timing, the volumetric efficiency was higher (by 4%) than in the earlier injection cases. This result implies that the methane direct injection engine can achieve higher torque by means of the late injection strategy.
Carbon Fiber Reinforcement of a Water Storage Tank for Beyond Design Basis Loads
Authors: Reich Alton , Charest John 
Published: December 2016

The severe damage to the Fukushima nuclear plant occurred as a result of a beyond design basis event. This has prompted a systematic review of safety critical systems at US nuclear power plants to evaluate the existing safety margin based on beyond design basis loads.
At one US nuclear power plant it was found that the Refueling Water Storage Tank (RWST) did not have sufficient margin to withstand the defined beyond design basis seismic event. An analysis indicated that the RWST would fail in an elephant foot buckling mode. This paper describes the design and analysis of a Carbon Fiber Reinforced Polymer (CFRP) repair system used to strengthen the RWST to increase the critical buckling stress for the elephant foot buckling mode.
On the Equivalent Mechanical Properties of Spiral Wound Gaskets
Authors: Attoui Hocine , Bouzid Abdel-Hakim 
Published: December 2016

Spiral wound gaskets are generally used to seal bolted joints working under high pressure and high temperature. The mechanical properties of the sealing element composed of the filler and the windings play important roles in the sealing performance and buckling strength of these gaskets. The proper modeling of a bolted joint that uses a spiral wound gasket requires the knowledge of the mechanical properties of the sealing element. The elastic modulus and Poisson’s ratio are often required in order to be used in any simplified analytical or numerical modelling of the gasket. A hybrid technique based on an analytical approach and experimental tests is developed to characterize the equivalent mechanical properties of spiral wound gaskets.
In this paper, an analytical model supported with numerical Finite Element Method (FEM) based simulation and experimental investigation is presented to characterize the mechanical properties of spiral wound sealing element. The results of the analytical model that are based on the theory of Lamé and consideration on the compatibility conditions between components, has an acceptable agreement with numerical simulation and experimental investigations.
Testing and Numerical Simulation of Elastomeric Seals Under Consideration of Time Dependent Effects
Authors: Weber Mike , Kömmling Anja , Jaunich Matthias , Wolff Dietmar , Zencker Uwe , Völzke Holger , Schulze Dietmar 
Published: December 2016

Due to delays in the siting procedure to establish a deep geological repository for spent nuclear fuel and high level waste and in construction of the already licensed Konrad repository for low and intermediate level waste, extended periods of interim storage will become more relevant in Germany. BAM is involved in most of the cask licensing procedures and is responsible for the evaluation of cask-related long-term safety issues. Elastomeric seals are widely used as barrier seals for containers for low and intermediate level radioactive waste. In addition they are also used as auxiliary seals in spent fuel storage and transportation casks (dual purpose casks (DPC)).
To address the complex requirements resulting from the described applications, BAM has initiated several test programs for investigating the behavior of elastomeric seals. These include experiments concerning the hyperelastic and viscoelastic behavior at different temperatures and strain rates, the low temperature performance down to −40°C, the influence of gamma irradiation and the aging behavior.
The first part of the paper gives an overview of these tests, their relevant results and their possible impact on BAM’s work as a consultant in the framework of approval and licensing procedures.
The second part presents an approach of the development of a finite element model using the finite element code ABAQUS®. The long-term goal is to simulate the complex elastomeric behavior in a complete lid closure system under specific operation and accident conditions.
Development of Gaskets and its Accessories for Electrical Insulation of Pipelines
Authors: Araujo Roberto H. G. , Romano Luiz P. , Veiga José C. , Silva Ana C. 
Published: December 2016

Insulation gasket kits are used to prevent electrochemical corrosion often observed in metal pipe system with dissimilar flanges materials or in buried pipelines. This insulation kit is typically used in refineries, pipelines, chemical plants and especially in offshore installations, such as oil platforms.
The market offers a great range of materials to meet these applications, which are based in phenolic resin, epoxy, rubber, etc. However, end users, frequently, do not have a complete understanding of all the requirements to do a proper specification of the insulation kit to meet their needs. A correct selection of the insulation kit requires knowledge about its physical as well as its electrical features in order to avoid a potential failure in the field.
Therefore, this paper proposes an overview of the main physical and electrical parameters for a reliable insulation kit, as well as alternative materials.
Short-Term and Long-Term Mechanical Testing to Evaluate the Effect of Flaws in Butt Fusion Joints in Polyethylene Pipes
Authors: Troughton Mike , Khamsehnezhad Amir 
Published: December 2016

The use of non-destructive examination (NDE) for assessing the quality of butt fusion joints in polyethylene (PE) pipes has been included in the draft Mandatory Appendix XXVI to Section III of the ASME Boiler and Pressure Vessel Code (Rules for construction of Class 3 buried polyethylene pressure piping). However, currently, there are no acceptance criteria for flaws in butt fusion joints in PE pipes. There is an ASME Task Group on flaw evaluation for PE pipe, which is developing a code case using linear elastic fracture mechanics (LEFM) to determine critical flaw sizes. However, the initial experimental crack growth data generated suggests that linear elastic fracture mechanics is not able to adequately describe slow crack growth in PE materials. In addition, this work is only considering planar lack of fusion flaws in the joint; it is not considering other critical flaw types that can occur in butt fusion joints, such as particulate contamination and cold fusion.
TWI has developed procedures using mechanical testing to develop flaw acceptance criteria for butt fusion joints in PE pipes. This is based on inserting lack of fusion flaws of known size and particulate contamination flaws of known concentrations into butt fusion joints and determining the effect of these flaws on both the short-term and long-term integrity of the joints. An important aspect of this work is to determine which of the wide array of mechanical tests available for assessing the integrity of butt fusion joints in PE pipes are the most discriminating.
This paper describes the procedures developed for inserting simulated flaws into butt fusion joints in PE pipes, the experimental work to compare the results from different standard short-term and long-term tests on flawed and unflawed joints and the procedures developed to determine flaw acceptance criteria.
Results have shown that the most discriminating short-term test for butt fusion joints in PE pipes is a tensile test using a waisted specimen, such as those defined in EN 12814-2, EN 12814-7 and ISO 13953, and the most discriminating property is the energy to break the specimen. The most appropriate long-term test for butt fusion joints in PE pipes is the whole pipe tensile creep rupture test, as defined in EN 12814-3; this is the only long-term whole pipe test that consistently generates slow crack growth in the fused joint, even if it contains no flaws.
Long-Term Investigations of Metal Seals for Storage Casks of Radioactive Materials
Authors: Nagelschmidt Sven , Probst Ulrich , Völzke Holger , Wolff Dietmar 
Published: December 2016

The Bundesanstalt für Materialforschung und –prüfung (BAM) is a federal institute for materials research and testing in Germany and has been involved in the qualification and safety evaluation procedures of metal seals from the early beginning of the interim storage licensing procedures for radioactive materials, stored in dual purpose casks. Regarding this subject, BAM investigates the long-term behavior of metal seals under the influence of temperature using experimental data and analytical approaches. The development of numerical models is in progress as well. Systematic experimental investigations performed by BAM indicate a continuous decrease of the remaining seal force and the usable resilience considering the leak tightness. Hence, there is a fundamental interest of describing time and temperature dependency to gain predictable values for the long-term behavior and to achieve reliable results with help of short-term tests.
The paper gives an overview about the sealing principle, test program and test results of metal seals of the type HELICOFLEX® HN200. The aging effect, respectively the long-term behavior in dependency of time and temperature, are introduced for two different outer liner materials, aluminum and silver.
Methods to Determine Low-Constraint Fracture Toughness: Review and Progress
Authors: Zhu Xian-Kui 
Published: December 2016

Fracture toughness is often described by the J-integral or crack-tip opening displacement (CTOD) for ductile materials. ASTM, BSI and ISO have developed their own standard test methods for measuring fracture initiation toughness and resistance curves in terms of the J and CTOD using bending dominant specimens in high constraint conditions. However, most actual cracks are in low constraint conditions, and the standard resistance curves may be overly conservative.
To obtain more realistic fracture toughness for actual cracks in low-constraint conditions, different fracture test methods have been developed in the past decades. To facilitate understanding and use the test standards, this paper presents a critical review on commonly used fracture toughness test methods using standard and non-standard specimens in reference to the fracture parameters J and CTOD, including (1) ASTM, BSI and ISO standard test methods, (2) constraint correction methods for formulating a constraint-dependent resistance curve, and (3) direct test methods using the single edge-notched tension (SENT) specimen. This review discusses basic concepts, basic methods, estimation equations, test procedures, historical efforts and recent progresses.