bluuebunny/crossref_metadata_2025_split huggingface dataset:
A mathematical model of the non-stationary filtration process for oil-supercritical CO2 system in a homogeneous porous medium under various modes of oil displacement
Authors: Radaev A.V , Kamil Sebur Ali , Essmat Abdul-lateef Wisam , Abdulaziz Abrahem Hussain , Plokhotnikov S.P , Salimyanov I.T , Vaseneva N.A , Sabirzyanov A.N 
Published: March 2020

Abstract
The phase diagram of the system “transformer oil-supercritical CO2” is built. The modes of miscible and microbubble displacement of oil are determined. Oil was displaced by carbon dioxide in a supercritical state on isotherms 313 and 333 K in the pressure range up to 12 MPa at the experimental bench created by the authors. New data have been obtained on the coefficient of oil displacement by supercritical CO2 from a model of a homogeneous oil reservoir in a miscible and micro-bubble mode of supercritical CO2 filtration. It was revealed that the miscible regime of oil displacement by supercritical CO2 has the greatest technological efficiency. For the region of a mixed filtration regime, a mathematical model was created and solved for the process of filtering the unsteady flow of “supercritical CO2-oil” in a homogeneous terrigenous porous medium in the pressure range up to 12 MPa, temperatures up to 333 K, the calculated curve agrees with the experimental data on the oil displacement coefficient. The convergence and stability of the difference scheme of the computational process is ensured. It was found that in the transition region of supercritical CO2 filtration on the boundary curve in the phase diagram and in the region of microbubble filtration of supercritical CO2, the process of oil displacement is more intense, which is associated with the appearance of a supercritical sublayer on the pore surface, which leads to slipping of the fluid inside the pore. For the transition-filtering region on the boundary curve in the phase diagram and in the region of the microbubble displacement of oil by supercritical carbon dioxide, a method for increasing technological efficiency is proposed based on the injection of supercritical CO2 and water rims to prevent the transition of microbubble carbon dioxide to the free phase.
Thermal Analysis and Temperature Distribution of Two-Layer and Spoke-Type Ferrite Interior Permanent Magnet Machine
Authors: Abdulrahem Hayder , Chi-Kwong Luk Patrick , Economou John 
Published: March 2020

Abstract
The main requirements for a rotating electric machine are the torque/power density and the energy efficiency. Producing an efficient electric machine required not only studying and analysing the electromagnetic properties but also deeper thermal analysis. It has been found that attention to the thermal design can be improve the total machine performance. In this paper a thermal model of the two-layer and spoke-type ferrite interior permanent magnet (IPM) machines is developed. FEA models are built to run the thermal studies and temperature distribution of the machine under different operating conditions. A prototype machine is built and tested for the experimental validations of the FEA. A prototype machine is tested under various working conditions. The testing results validate analytical model and the FEA methods.
Impact of the Weather on the Combined Economic and Emission Optimization Problem of MG
Authors: Al-Saadi Mohammed K. , Dakheel Hashmia Sh. , Abdullah Zainb B. 
Published: March 2020

Abstract
The high integration of renewable energy resources and utilizing of storage devices with possible exchange power with the utility grid make the optimization problem of microgrid (MG) significantly difficult comparing with the conventional systems. This paper quantifies the impact of weather conditions on the combined economic and emission optimal operation of the MG. The optimization problem is formulated as mixed integer quadratic program (MIQP), where the unit commitment (UC) is taken into consideration in the optimization problem. In addition, realistic constraints are taken into account to make the problem close to the real scenario. The proposed optimization approach is applied to the low voltage MG, which includes distributed generators (DGs), renewable energy sources (wind, solar) and storage battery. The results reveal that the abundant of wind and solar energies leads to reduce the operation and emission cost.
Portable field hospital fed from solar system depends on interleaved boost converter (IBC)
Authors: Makdisi Carlo Y. , Mariam Marah F. , Maarouf Jaafar T. 
Published: March 2020

Abstract
In this paper we will suggest equipment for a portable field hospital that is electrically fed by solar panels. The solar panel is connected to the removable (Portable) field hospital via an interface, which is an Interleaved Boost Converter (IBC). The analytical study is carried out for the traditional Boost Converter(BC) and the Interleaved Boost Converter (IBC) using Matlab/Simulink To ensure the electric supply of the portable field hospital with suitable voltage values. The paper will explain what might happen if we doubled or tripled the main elements of the conventional boost converter. The expected results will reflect the implementation importance of the interleaved converter (IBC) in comparison with conventional converter. We will also compare the different types of interleaved converter (IBC), so that we get the best interior connection of the IBC, which achieves the suitable distribution of the total current between the coils, as well as the best size – weight specifications. The selected IBC will contain less ripple in the output voltage waveform, where we provide the potable field hospital feed without disturbances or breakdowns, which cause the IBC to be out of serves or fault occurring to any part of it.
Optimized manufacturing of the small dual wind turbine used to generate electricity in central Iraq areas
Authors: Khalefa Muhannad Z. , Abd Alkarim Shereen F. , Salih Rasha S. 
Published: March 2020

Abstract
Start your Due to the importance of generating electricity from wind turbines, single rotor wind turbine and dual rotor wind turbine. There was a need to design and manufacture the turbine system operating in both types mentioned above and have advantages to increase the generation of electric power. The aim of this work was to generate electrical power at a wind speed of up to 1m/s and more to achieve this wind speed and direction of the wind were adopted from tables of the Zerbatiya Station of the Wasit Governorate (Geographically located in central Iraq). The simulation was used to generate rotational speed for front and rear blades from 1m/sec to 13m/sec. A new idea was used to induce the dual small wind turbine to generate electrical power at low speed (1m/sec). In this case, there is latent energy in the surrounding wind turbine, but it is not that helps to rotate the wind turbine. To apply this idea the starter motor is used. Passive magnetic bearing supports have been used to reduce friction of the rotors this will reduce losing of wind energy. Brakes are the mechanical devices which aimed to slow or shut down the machine. They are also designed to prevent moving after stopping. Finally, the Genetic Algorithm (GA) was used within the program for the purpose of obtaining the best amount of power generated. All the above were for the purpose of determining the best position for blades at different speeds to generate electricity by using Permanent Magnetic Synchronous Generator (400W).Results of this paper: (a)-The starter motor proved good performance when using it. (b)-Using passive magnetic bearing proved effect on increase the power generation. (c)-Mechanical brakes work to stop the system within a period of time and not immediately as this will negatively affect the performance of the system.
Experimental and Numerical Study of a New Corrugated and Packing Solar Collector
Authors: Jalil Jalal M. , Ahmed Majida K. , Idan Hussein A. 
Published: March 2020

Abstract
The thermal performance of a new solar air collector with corrugated packing is studied in this work. A new innovate shape was suggested in this paper to improve the thermal performance of the solar air collector. Mathematical models are developed to investigate the thermal performance of the collector and the results are verified by experiments. Effects of the operating parameters, solar radiation intensity and inlet air velocity are studied to optimize the thermal performance of the collector. Comparisons are conducted between the experimental and numerical results and good agreement was found. The new innovate shape shows better performance than other corrugated shapes and the absorber and air gained higher temperatures. The maximum temperature of air inside duct at the exit point was 69.1 C° at solar heat flow of 725 W/m2 and inlet velocity 1.0 m/s. The new shape shows better performance than other corrugated absorber.
BIM2BEM for room heating-cooling time estimation after turning on the HVAC systems
Authors: Pezeshki Zahra , Darabi Ahmad , Moghiman Mohammad 
Published: March 2020

Abstract
The complexity of real constructions, with irregular geometry, inhomogeneous materials, variable morphology, alterations and damages, poses numerous challenges in digital modeling and simulation of structural performances under different types of actions. Recent developments in Building Information Modeling (BIM) have introduced advanced modeling capabilities. This paper presents a new methodology using BIM2BEM for the estimation of heating and cooling time after we turn on the HVAC systems. The generation of the BIM is carried out with information of a case study model in Autodesk REVIT software. Then, BIM is turned into a Finite Element Model (FEM) in COMSOL Multiphysics software and Building Energy Modelling (BEM) is obtained in winter and summer which preserves irregularities and anomalies, such as verticality deviation and variable thickness. Afterwards, the cooling and heating time of the whole room after turning on the cooling and heating appliances was calculated and compared with reality results.
Numerical Investigation of Thermal Performance for Air Solar Collector with Multi Inlets
Authors: Jalil Jalal M. , Ayaal Adel H. , Hardan Abdulwahhab A. 
Published: March 2020

Abstract
Over the years, there has been rigorous modification of solar collectors for the thermal needs of the era to be efficiently served. A variety of design innovations have paved their way into the invention of novel ways of securing more solar energy as useful heat. Primarily, this study investigates the effects of multi air inlets on the transfer of heat between air flow and the absorber of flat plate collector. Computational Fluid Dynamics was employed to simulate a flat plate collector with 1, 2 and 3 inlets to evaluate the thermal performance with more than one inlet. The results showed that the 3 inlets case has the highest exit temperature followed by 2 inlets and then 1 inlet. Also higher exit air temperature can be obtained for higher heat flux and slower inlet velocity.
Intensification of heat transfer in the cooling systems of radio electronic equipment under free and forced convection
Authors: Lopatin A.A. , Kamil Sebur Ali , Ahmed Israa S. , Gabdullina R.A. , Biktagirova A.R. 
Published: March 2020

Abstract
This paper considers the issues of heat transfer intensification in the air cooling system of heat-loaded elements of radio-electronic equipment based on split fins. The results of the study of heat transfer in free and forced convection cooling systems for heat-loaded elements of electronic equipment are presented. The thermal efficiency of systems based on smooth and partially split ribs is compared; the efficiency of split ribs is 16-20%. The dependences of thermal resistance on thermal load are determined. The results of a comparison of mathematical and physical modeling are provided. The influence of the method of supplying heat to split ribs is estimated. Optimization of the work area is presented.
Performance Evaluation of Grid Wireless Sensor Network with Different Packet Size for Pipeline in Downstream of Oil and Gas Industry
Authors: Azman A S A , Lee M Y , Subramaniam S K , Feroz F S 
Published: March 2020

Abstract
In the past few decades, sensed data such as wind, vibration, temperature, and humidity were sent through the costly wire cable. With recent advancement and innovation in the wireless field, wireless sensor network (WSN) has emerged to benefit many industries in different aspects primarily in term of cost. WSN has been widely used in various applications due to its wide coverage area, particularly in oil and gas facility monitoring. Hence, the usage of grid WSN fits the wide coverage area mainly in the pipeline of downstream of oil and gas process. The main objective of this paper is to give a better understanding of the impact of different packet sizes, routing protocols, and the number of nodes towards a grid WSN as well as to provide open research issues in this field. Two types of routing protocols have been presented in this paper; reactive (AODV) and proactive (DSDV) with different packet sizes using a grid node arrangement. The simulated results have shown that with the increasing size of the network, more performance degradation occurred regardless of the packet size used. This issue can be seen through the packet loss and throughput loss in the network prominently after the deployment of 80 nodes and above. Apart from that, DSDV has shown a better delivery ratio, less number of passive nodes existence and less routing overhead produced in the network as compared to the AODV routing protocol.
Image Compression Using High Level Wavelet Transformer with Non-Uniform Quantizer and Different Levels Huffman Codes
Authors: Khalaf Gaber Rajaa , Abdulqader Hussein Ahmed , Kadhim Oudah Manal , Hameed Reja Ahmed 
Published: March 2020

AbstractImage compression solutions are a pivotal field that gain over a remarkable research interest and called upon to extend widely with respect to the increasing of its applications. The considerable challenge of this solution is related to the storage and bandwidth requirements. A highly compression rate with a high image resolution is considered to be the key factors for implementing a robust image compression technique. In this paper, the proposed method is deemed to be simple and effective due to using different levels of compression process which is starting from dividing the image into sub-images and using high level discrete wavelet transform (DWT). In addition, the Huffman code with non-uniform Quantizer has been used to minimize the compression data rate with high quality reconstructed image. The promising simulation results of the proposed method achieved the most two significant criteria which are denoted by high image quality and a high image compressed ratio. For instance, the proposed strategy simulation results of Lena image achieved PSNR equals to 42.4094 dB with a compression ratio (CR) equals to 47.5435. Moreover, the simulation results of Flower image accomplished PSNR equals to 42.8348 dB with a compression ratio equals to 55.3389 under the same simulation conditions.
Design and Software Implementation of Analog and Digital Filters For Coherent Receivers under Noisy Channels
Authors: Thabit Ahmed A. 
Published: March 2020

Abstract
One of the most important stations in any communications system is the filtering station. Due to the noise power that effects on the signal, the system must include filtering process to eliminate this effect. In this paper, analog and digital filters are designed and implemented using Matlab tools to solve the problems occurred during receiving the signal that effects on the synchronization such as those for coherent receivers. The offsets of Phase and frequency are major problems in the identification of signals that results reduction in the performance; such as, whenever higher order modulations are used. Two systems are designed and simulated. The first one is analog system and the second one is digital system. 3rd order Butterworth filter is selected for system one and digital IIR filter is selected for system two. Filter order was selected according to diagnosis the level of noise power and the transmitted frequency to meet certain frequency domain design specifications. Obtained results showed excellent performance in the receiving and demodulating the received signal. Evaluation of the results is basically depend on comparison between the transmitted and received samples.
Relative Income Deprivation and All-Cause Mortality in Japan: Do Life Priorities Matter?
Authors: Gero Krisztina , Miyawaki Atsushi , Kawachi Ichiro 
Published: March 2020

Abstract

Background/Purpose
Relative deprivation (RD) is proposed to affect health through psychosocial stress stemming from upward social comparisons. This study hypothesized that prioritizing values, such as social engagement and personal growth (as opposed to prioritizing work), would inoculate against the toxic effects of upward social comparisons.

Methods
Prospective data of 9,533 subjects (4,475 men and 5,058 women) participating in the Komo-Ise study answering a baseline questionnaire in 1993 and a follow-up survey in 2000 were analyzed. Associations between RD—using Yitzhaki Index (YI) and Income Rank (IR)—and mortality were evaluated using Cox proportional-hazard regression models. At follow-up, people were also asked about what they prioritized in life: work, social engagement, or personal growth.

Results
1,168 deaths (761 men and 407 women) occurred during follow-up (to the end of 2011). Controlling for sociodemographic factors, the hazard ratio (HR) for mortality was 1.22 (95% confidence interval [CI] = 1.08–1.38) per a standard deviation (SD) increase in YI and 1.18 (95% CI = 1.03–1.35) per an SD decrease in IR. Life priorities (LP) were not statistically significantly associated with mortality. In women, the interaction between LP and YI was statistically significant. In fully adjusted models, women who endorsed only work as very important in their lives had a 2.66 (95% CI = 1.23–5.77) times higher HR for mortality per SD increase in YI compared to women who valued social engagement/personal growth. An interaction between LP and RD was not found in men.

Conclusions
Increased relative income deprivation was associated with a higher risk of all-cause mortality independently of absolute income. Focusing on social engagement/personal growth (as opposed to work) appears to inoculate women against the toxic effects of relative deprivation.
Health Warnings and Beverage Purchase Behavior: Mediators of Impact
Authors: Grummon Anna H , Brewer Noel T 
Published: March 2020

Abstract

Background
To reduce diet-related chronic disease, policymakers have proposed requiring health warnings on sugar-sweetened beverages (SSBs). Health warnings reduced purchases of these products by 22% in our recent randomized controlled trial, but the mechanisms remain unclear.

Purpose
We sought to identify the psychological mechanisms that explain why SSB health warnings affect purchase behavior.

Methods
In 2018, we recruited 400 adult SSB consumers to complete a shopping task in a naturalistic convenience store laboratory in North Carolina, USA. We randomly assigned participants to either a health warning arm (all SSBs in the store displayed a text health warning) or to a control arm (SSBs displayed a control label). Participants selected items to purchase with cash.

Results
Compared to control labels, health warnings elicited more attention, negative affect, anticipated social interactions, and thinking about harms (range of ds = 0.63–1.34; all p &lt; .001). Health warnings also led to higher injunctive norms about limiting SSB consumption (d = 0.27, p = .008). Except for attention, all of these constructs mediated the effect of health warnings on SSB purchases (all p &lt; .05). In contrast, health warnings did not influence other attitudes or beliefs about SSBs or SSB consumption (e.g., healthfulness, outcome expectations, and response efficacy).

Conclusions
Health warnings on sugar-sweetened beverages affected purchase behavior by eliciting negative emotions, increasing anticipated social interactions, keeping SSBs’ harms at top of mind, and shifting norms about beverage consumption. Results are consistent with recent studies of why tobacco warnings influence quitting behavior, pointing toward a general framework for understanding how health warnings affect behavior.

Clinical Trials Registration
NCT #03511937.
Cultural Adaptations of Evidence-Based Mental Health Interventions for Refugees: Implications for Clinical Social Work
Authors: Fennig Maya 
Published: March 2020

AbstractAs the number of refugees worldwide reaches unprecedented levels, social workers’ ability to provide effective and appropriate mental healthcare to this population is as critical as ever. This article provides a review of contemporary debates revolving around the cultural adaptation (CA) of mental health interventions—when it is warranted, what approach should be taken and what components of an intervention should be adapted. CA is presented as a promising and pragmatic approach to service delivery, one that can assist clinical social workers in designing and implementing interventions that reflect refugees’ local needs and knowledge without neglecting important advances in research evidence and clinical expertise. However, it is not without its challenges. By drawing on literature related to the integration of cultural and contextual factors in mental health interventions and services, the article addresses critical issues in the CA approach and asks: is it possible to strike a balance between fidelity to evidence-based interventions and culturally compatible care?
Bidirectional gut-to-brain and brain-to-gut propagation of synucleinopathy in non-human primates
Authors: Arotcarena Marie-Laure , Dovero Sandra , Prigent Alice , Bourdenx Mathieu , Camus Sandrine , Porras Gregory , Thiolat Marie-Laure , Tasselli Maddalena , Aubert Philippe , Kruse Niels , Mollenhauer Brit , Trigo Damas Ines , Estrada Cristina , Garcia-Carrillo Nuria , Vaikath Nishant N , El-Agnaf Omar M A , Herrero Maria Trinidad , Vila Miquel , Obeso Jose A , Derkinderen Pascal , Dehay Benjamin , Bezard Erwan 
Published: March 2020

Abstract
In Parkinson’s disease, synucleinopathy is hypothesized to spread from the enteric nervous system, via the vagus nerve, to the CNS. Here, we compare, in baboon monkeys, the pathological consequences of either intrastriatal or enteric injection of α-synuclein-containing Lewy body extracts from patients with Parkinson’s disease. This study shows that patient-derived α-synuclein aggregates are able to induce nigrostriatal lesions and enteric nervous system pathology after either enteric or striatal injection in a non-human primate model. This finding suggests that the progression of α-synuclein pathology might be either caudo-rostral or rostro-caudal, varying between patients and disease subtypes. In addition, we report that α-synuclein pathological lesions were not found in the vagal nerve in our experimental setting. This study does not support the hypothesis of a transmission of α-synuclein pathology through the vagus nerve and the dorsal motor nucleus of the vagus. Instead, our results suggest a possible systemic mechanism in which the general circulation would act as a route for long-distance bidirectional transmission of endogenous α-synuclein between the enteric and the central nervous systems. Taken together, our study provides invaluable primate data exploring the role of the gut-brain axis in the initiation and propagation of Parkinson’s disease pathology and should open the door to the development and testing of new therapeutic approaches aimed at interfering with the development of sporadic Parkinson’s disease.