Miracle-dz/UniFAR-FTUs huggingface dataset:
Effect of Initial Conditions on the Compound Shear- and Buoyancy-driven Mixing

Effect of Initial Conditions on the Compound Shearand Buoyancy-driven Mixing. (August 2012) Beth Ann Placette, B.S., Texas A&M University Chair of Advisory Committee: Dr. Devesh Ranjan The effect of initial conditions in combined shearand buoyancydriven mixing was investigated through the use of an implicit large eddy simulation code under active development at Los Alamos National Laboratory and Texas A&M University. Alterations were done over several months both at Los Alamos National Laboratory and at the Texas A&M University campus, and include a transition from tilted rig to convective channel arrangement, introduction of an inertial reference frame, alteration of boundary conditions, etc. This work resulted in the development of a numerical framework with the capability to model various shear and Atwood number arrangements such as those seen in an inertial confinement fusion environment. In order to validate the code, it was compared to three published experiments, one with Atwood number 0.46, one with high Atwood number 0.6, and one with very low Atwood number 0.032. Upon validating the code, pure Rayleigh-Taylor and pure Kelvin-Helmholtz instabilities were modeled along with five intermediate cases of increasing shear and constant density gradient. Plots of mixing width, Richardson number, growth parameter, and molecular mixing were compared in order to determine
Runaway electron generation and loss in EAST disruptions

Runaway currents have been detected during unintended disruptions in the circular plasma with the limiter configuration in the Experimental Advanced Superconducting Tokamak (EAST). The runaway electron (RE) plateau can carry up to 80% of the pre-disruption plasma current. The highest runaway currents correspond to the lowest loop voltage, which is contrary to the observations made in most tokamaks. This anomalous behavior is attributed to the acceleration of the pre-existing wave resonant suprathermal electrons by lower hybrid waves during the disruption decay phase. Two distinct types of RE-related relaxation phenomena, distinguished on the basis of the amplitude of the magnetic fluctuations, have been found during the disruptions. Large-amplitude magnetohydrodynamic activity with indications of RE loss is observed during the RE plateau when the edge safety factor decreases to less than 3, and the external kink mode is discussed to resolve this anomaly. Burst-like relaxations with small-amplitude magnetic fluctuations and ∼0.6 kHz frequency are confirmed from the spikes in the hard x-ray array signals under a negative loop voltage. Measurement of the RE energy distribution suggests that the instability is driven by medium-energy REs.
Effect of Nitrogen Application on Accumulation of Dry Matter and Nitrogen,Yield of Spring Wheat under Drip Irrigation

To explore the effect of nitrogen application on accumulation amount of dry matter and nitrogen,and yield of drip irrigated spring wheat in Northern Xinjiang,an experiment of 5 nitrogen treatments(N0:0 kg·hm-2,N1:150 kg·hm-2,N2:300 kg·hm-2,N3:450 kg·hm-2 and N4:600 kg·hm-2) with dominantly applied cultivar Xinchun 6 was carried at experimental station,Shihezi University.The results showed that the accumulation of dry matter and nitrogen could be well fitted by logistic curve.The highest accumulation amount of dry matter and nitrogen could be obtained with the reasonable nitrogen application.The dry matter and nitrogen accumulation of treatment N2 were the highest with 19 745.03 and 310.97 kg·hm-2,respectively,which were higher than other treatments by 4.42% - 60.74% and 3.68% - 79.65%. Nitrogen use efficiency of drip irrigation spring wheat was significantly affected by nitrogen application rate.Firstly it increased and then decreases with the increase of nitrogen application rate.Applied nitrogen fertilizer can significantly improve crop yields by 22.24%,45.04%,37.59% and 24.47% for N1,N2,N3 and N4 treatments compared N0,respectively.The function fitted results between yield and nitrogen application rate showed that the highest yield could be obtained when nitrogen application rate was 366.83 kg hm-2.
Fractal microstrip patch antennas for dual-band and triple-band wireless applications

Abstract In this paper, the design and development of dual-band and triple-band fractal microstrip patch antennas with enhanced gain are presented. The structure is based on the Sierpinski carpet fractal, where the multiband functionality is achieved by applying the fractal iteration technique. The fractal antenna characteristics along with analysis of the reflection coefficient and the radiation patterns for each iteration are presented. The dual-band fractal microstrip patch antenna (DBFMPA) is operating at 4.9 and 5.3 GHz and the triple-band fractal microstrip patch antenna (TBFMPA) is operating at 2.4, 5.3, and 5.9 GHz. The defected ground structure (DGS) and a reflector plane is utilized for enhancing the gain of the antenna. Design and optimization of the DBFMPA and TBFMPA are done using the Computer Simulation Technology (CST) Microwave Studio Suite. The presented DBFMPA and TBFMPA are suitable for industrial, scientific, and medical (ISM) wireless applications.
Climate Aridity and the Geographical Shift of Olive Trees in a Mediterranean Northern Region

Climate change leverages landscape transformations and exerts variable pressure on natural environments and rural systems. Earlier studies outlined how Mediterranean Europe has become a global hotspot of climate warming and land use change. The present work assumes the olive tree, a typical Mediterranean crop, as a candidate bioclimatic indicator, delineating the latent impact of climate aridity on traditional cropping systems at the northern range of the biogeographical distribution of the olive tree. Since the olive tree follows a well-defined latitude gradient with a progressive decline in both frequency and density moving toward the north, we considered Italy as an appropriate case to investigate how climate change may (directly or indirectly) influence the spatial distribution of this crop. By adopting an exploratory approach grounded in the quali-quantitative analysis of official statistics, the present study investigates long-term changes over time in the spatial distribution of the olive tree surface area in Northern Italy, a region traditionally considered outside the ecological range of the species because of unsuitable climate conditions. Olive tree cultivated areas increased in Northern Italy, especially in flat districts and upland areas, while they decreased in Central and Southern Italy under optimal climate conditions, mostly because of land abandonment. The most intense expansion of the olive tree surface area in Italy was observed in the northern region between 1992 and 2000 and corresponded with the intensification of winter droughts during the late 1980s and the early 1990s and local warming since the mid-1980s. Assuming the intrinsic role of farmers in the expansion of the olive tree into the suboptimal land of Northern Italy, the empirical results of our study suggest how climate aridity and local warming may underlie the shift toward the north in the geographical range of the olive tree in the Mediterranean Basin. We finally discussed the implications of the olive range shift as a part of a possible landscape scenario for a more arid future.
Gamification Approach in Teaching Web Programming Courses in PHP: Use of KAHOOT Application

: Learning algorithmics and programming fundamental courses is widely considered to be quite challenging in the field of computer science. Gamification is a good alternative educational practice to promote programming teaching, it allows better engagement of students in their learning. Students acquire a reasonable level of abstraction and logic and develop reflections on various course concepts. They are better introduced to critical programming situations. In the present work, we investigated the impact of introducing simple gamified educational sequences within a dynamic programming PHP course on first year Master students in Educational Technology and Pedagogical Engineering (TEIP). Our use of gamification learning sequences based on the application KAHOOT in this course revealed a better engagement of students. 90% of the students in our experimental group expressed being more motivated and committed for the course and 87.5% of them expressed positive attitudes on using KAHOOT as a teaching tool. The majority (90%) expressed their intention to recommend KAHOOT to other teachers.
Evaluation of the Antioxidant Properties of Some Commonly Eaten Vegetables in Akwa Ibom State of Nigeria

Aims: To evaluate the antioxidant components and also antioxidant activities of ten local vegetables commonly consumed in Akwa Ibom State, Nigeria. Place and Duration of Study: Department of Pharmaceutical and Medicinal Chemistry, Faculty of Pharmacy, University of Uyo, Akwa Ibom State, Nigeria between April 2011 and July 2012. Methodology: Standard methods were used to evaluate the concentration of total phenols, vitamin C, vitamin E, total flavonoids, total tannins, anthocyanin, β-carotene and lycopene in the leaves of Heinsia crinata, Ocimum gratissimum, Telfaira occidentalis, Talinum triangulare, Corchorus olitorius, Amaranthus hybridus, Gnetum africana, Vernonia amygdalina, Gongronema latifolia and Lasianthera africana. Ferric reducing antioxidant power (FRAP), iron chelating activity, Nitric oxide Original Research Article Eseyin et al.; ARRB, 5(2): 165-173, 2015; Article no. ARRB.2015. 018 166 and 2,2-Diphenyl-1-Picrylhydrazyl (DPPH)-radical scavenging activities, and total antioxidant activity were also determined using standard methods. Results: Lasianthera africana recorded the highest amount of Lycopene (0.9951±2.23× 10 -3. mg/100ml) and Anthocyanin (0.0943±1.30×10 -3 ). Gongronema latifolium also recorded the highest amount of Tannin (6.6±1.01×10 -3 mg/100g) and β-carotene (1.692±1.31×10 -4 mg/100 ml). Similarly, Hensia crinata, Cochorius olitorius and Vernonia amygdalina recorded the highest amount of Vitamin E (24.761±7.22×10-2 μM), total phenol (0.100±6.84×10 -5 mg/ml) and flavonoids (36.784±1.72×10 -2 mg/ml), respectively. Ocimum gratissimum gave the highest % inhibition (74.0%) of DPPH at a concentration of 60 μg/ml of extracts compared to the standard drugs (Vitamin C, 92.0% and Vitamin E, 35.0%). Vernonia amygdalina showed highest inhibition (89.97%) of Nitric Oxide while Ocimum gratissimum inhibited ferric reducing antioxidant activity by 91.43%. It was found that Vitamin C correlated significantly with the antioxidant activity (r 2 =0.7072, P=0.05). Flavonoids also correlated significantly with the Ferric Reducing antioxidant Power (r 2 =0.6784, P<0.05). Conclusion: Ocimum gratissimum exhibited the best antioxidant activity and should be explored further for this purpose.
Cascaded H-bridge Based STATCOM With Improved Ride Through Capability of Submodule Failures

This article investigates the operation of cascaded H-bridge (CHB) based static synchronous compensator (STATCOM) after failure in its submodules (SMs). Once a switch fails, the corresponding faulty SM is bypassed. In the post-fault operation, a zero-sequence voltage (ZSV) is injected to the converter phases to generate the maximum possible line-to-line voltage. Using a clamping technique, the fundamental component of injected ZSV (FZSV) is minimized according to the operating point of CHB STATCOM. But, FZSV leads to unequal flow of active power into the converter phases. In the proposed method, negative-sequence current is controlled to manage the active power flow within CHB phases. By doing this, the effect of FZSV on active power of CHB phases is compensated and the voltages of capacitors are kept balanced. This method ensures the continuous operation of CHB STATCOM with the minimum over-design and guarantees the voltage balance of capacitors after a failure. The presented simulation and experimental results validate the feasibility and effectiveness of the proposed method.
Mass Spectrometric Calibration Procedure for Real-Time Detection of Lighter Hydrocarbons

Determining gas compositions from live well fluids on a drilling rig is critical for real time formation evaluation. Development and utilization of a reliable mass spectrometric method to accurately characterize these live well fluids are always challenging due to lack of a robust and effectively selective instrument and procedure. The methods currently utilized need better calibration for the characterization of light hydrocarbons (C1–C6) at lower concentrations. The primary goal of this research is to develop and optimize a powerful and reliable analytical method to characterize live well fluid using a quadruple mass spectrometer (MS). The mass spectrometers currently being used in the field have issues with detection, spectra deconvolution, and quantification of analytes at lower concentrations (10–500 ppm), particularly for the lighter (<30 m/z) hydrocarbons. The objectives of the present study are thus to identify the detection issues, develop and optimize a better method, calibrate and QA/QC the MS, and validate the MS method in lab settings. In this study, we used two mass spectrometers to develop a selective and precise method to quantitatively analyze low level lighter analytes (C1–C6 hydrocarbons) with masses <75 m/z at concentrations 10–500 ppm. Our results suggest that proper mass selection like using base peaks with m/z 15, 26, 41, 43, 73, and 87, respectively, for methane, ethane, propane, butane, pentane, and hexane can help detect and accurately quantify hydrocarbons from gas streams. This optimized method in quadrupole mass spectrometer (QMS) will be invaluable for early characterization of the fluid components from a live hydrocarbon well in the field in real time.
Changes in Physiological and Relative Genes Expression Response of Mandarin Citrus (Citrus reticulata Blanco) cv Rimau Gerga Lebong (RGL) Grafted onto Different Citrus Rootstocks

Background: RGL mandarin is one of the important mandarin citrus varieties in Indonesia. The tolerance of RGL mandarin citrus to water deficit can be induced by the rootstock. This study aimed to characterize the physiological responses and transcriptional gene expression of RGL mandarin citrus grafted onto three rootstock genotypes during the dry and the rainy seasons.Methods: Three-years-old mandarin citrus trees cv. Rimau Gerga Lebong (RGL) grafted onto three citruses (JC, Cit and K) were planted at the experimental field of the ICISFRI. The experiment was conducted with a randomized block design and each scion-rootstock combination contained five replications. All of the physiological and relative gene expression parameters observed were conducted at the last of the dry season (September 2019) and the mid of the rainy season (January 2020). Water deficit was induced by no watering plants during the dry season.Result: The results of physiological responses and relative gene expression analyses showed that RGL-Cit combination had better than RGL-JC combination and RGL-JC combination had better than RGL-K combination. RGL-Cit combination showed less wilt than RGL-JC and RGL-K combinations. The RGL-Cit combination had the highest stomatal density, stomatal aperture, stomatal conductance and photosynthetic rate in the dry season. Different plant combinations showed different gene expressions. RGL-JC and RGL-K combinations were upregulated in almost all the primers related to drought responses tested in the dry season. RGL-Cit combination only upregulated the PIP1, PIP2 and ACS2 and unregulated the others in the dry season. Therefore, citrumelo seems to be a valuable type of rootstock.
The interplay between inter-personal and inter-organizational relationships in coordinating supply chain activities

PurposeThis paper aims to identify and explain the link between relational dynamics and the development of coordination capabilities of Fourth-Party Logistics Providers (4PL) within a supply chain (SC). We aim to demonstrate the critical role relational dynamics can play in converting trust from interpersonal to inter-organizational level and facilitate the improvement of capabilities to coordinate customer's SC activities.Design/methodology/approachUsing semi-structured interviews with 78 logistics managers operating in 45 different logistics service providers located in France, we developed a set of propositions and built a conceptual framework. Exploratory qualitative research in the form of propositional discourse analysis (PDA) is used to develop propositions in our research to contribute to theory in supply chain management (SCM). FindingsResults indicate that both interpersonal and inter-organizational trust is a convertible capital. Based on their dynamic interactions, these two levels of trust endow the supply chain partners with economic benefits that would otherwise be highly costly or even practically extremely difficult to achieve through complex socio-economic transactions (meso-social level). Research limitations/implicationsFuture research may test our conceptual model using primary and secondary data and conduct longitudinal case studies that are necessary to triangulate our results and thus strengthen our conclusions. The prospect of adding control variables to our model would be of considerable importance.Practical implicationsOur results suggest that “4PL” need to invest more in interpersonal relations to facilitate collaboration with their clients and enhance their capability to coordinate and manage customer's supply chain activities. The ability to convert interpersonal trust represents an invaluable capital contributing to the achievement of above-normal profits.Originality/valueThis work contributes to a better understanding of the coordination of supply chain activities through the development, mobilization and maintenance of social capital. While previous research explained the importance of trust in SCM, this paper explores and studies the process of converting interpersonal trust into social capital mobilized at the supply chain level. We add to the existing literature on structural and relational dimensions of social capital by offering a process-based explanation of the conversion of interpersonal trust into inter-organizational trust and its role in facilitating collaboration in logistics services.
Hashimoto’s Encephalopathy: A Rare Cause of Seizure-like Activity

Hashimoto’s encephalopathy is an uncommon disorder that may present with a wide variety of different neurological signs and symptoms that can include acute altered level of consciousness, psychosis, seizures, ataxia, dementia, myoclonus, and stupor. We present a case of a 60-year-old female patient who was admitted to the internal medicine floor for workup for seizures of unknown etiology. Investigations, including a complete blood count, basic metabolic panel, magnetic resonance imaging (MRI) of the brain, cerebrospinal fluid analysis, and NMDA (N-methyl-D-aspartate) receptor encephalitis screen, were all unremarkable. Thyroid-stimulating hormone levels and anti-thyroid peroxidase antibodies were found to be elevated, suggesting an underlying etiology of Hashimoto’s thyroiditis. Treatment with corticosteroids and levothyroxine can lead to resolution of symptoms. This case report is presented to suggest the importance of serological screening for anti-thyroid antibodies in the workup of all patients with unknown causes of encephalopathy along with providing a review of the literature.
An ultra-wideband and wide-angle optically transparent flexible microwave metamaterial absorber

In this work, we propose an ultra-wideband and wide-angle optically transparent flexible metamaterial absorber (MMA), consisting of a multilayered structure with a transparent polyvinyl chloride layer and a periodic indium-tin-oxide patch array attached to a polyethylene terephthalate film layer. The absorptivity of the proposed MMA reaches above 90% from 5.61 to 29.17 GHz whether it is flat or even bent with 60º thanks to the flexibility of the materials. Excellent agreement between the measured and simulated results verify our design. The proposed MMA holds great promise in applications for flexible devices that require optical transparency, ultra-wideband and wide angle stealth.
A global optima search field division method for evolutionary algorithms

Abstract This study aims to investigate the deployment of a proposed search field division method (SFDM) within evolutionary algorithms (EAs) to enhance the capability of searching for the global optima in nonlinear problems. The proposed technique is benchmarked against the following eight widely-used single-modal, multi-modal, and unimodal benchmark functions: Sphere, Rosenbrock, Rastringin, Griewank, Ackley, Fletcher, Quartic, and Schwefel functions, and the outcome is compared to their standard EAs counterparts to validate the effectiveness of the deployed approach in EAs. In the proposed method, we apply three low, medium, high field divisions (1, 2, and 5) dimensions on nine different EAs simultaneously with two different scenarios, 10 and 100 variables, to reach the optimal solution. Then for the validity of our proposed SFDM technique, we examined the exploration-exploitation search space rates and diversity behavior. The results of the implementation of SFDM on eight benchmark test functions show that the consideration of dimensions using SFDM for EAs improves the outcomes of all nine tested EAs. In our proposed method, we find better compatibility with the integration of SFDM in the Particle Swarm Optimization Algorithm concerning searching for the optimum solution relative to the other EAs. Highlights A novel Search Field Division Method (SFDM) for evolutionary algorithms. Applying three field divisions (1, 2, and 5) dimensions on nine different Evolutionary Algorithms (EAs) simultaneously to reach the optimal global solution. The implementation of SFDM on eight benchmark functions shows significant improvement in all nine tested EAs. In our proposed method, we find the Particle Swarm Optimization Algorithm has better compatibility with respect to the other EAs.
First Report on Pea Seed-borne Mosaic Virus in Hungary

One of the most important diseases of pea is caused by Pea seed-borne mosaic virus (PSbMV), which has a relatively wide host range. Since there are few varieties with resistance against the virus, and spraying insecticides is not very effective, the determination of the disease and the pathogen in the seeds is very important. Inoculum prepared from pea seeds showing typical virus symptoms caused very mild symptoms on Chenopodium amaranticolor and C. quinoa, but several chlorotic/necrotic lesions on bean (Phaseolus vulgaris) cv. Scarlet, and systemic symptoms with mosaic and curling of top leaves on bean cv. Maxidor. The detection of the virus was carried out by PCR using universal primers and virus sequence analysis. According to the phylogenetic analysis the PSbMV isolate identified in Hungary belongs to the pathotype P1 and associated with the cluster 2 isolates.