Miracle-dz/UniFAR-FTUs huggingface dataset:
The Investigation of Polarization Diversity in MIMO System at 2.4 GHz

This paper describes the concept of multiple input multiple output (MIMO) system using polarization diversity that can enhance the channel capacity and increase the data output performance of the system. The microstrip antenna array is designed, fabricated and measured at the desired operating frequency for this measurement. Computer Simulation Technology (CST) software is used to design and simulate the microstrip antenna array. The simulation and measurement data results are compared and discussed. The fabricated microstrip antenna is used to develop the Radio Frequency (RF) MIMO test bed system. The system measurement was conducted in Microwave Laboratory at Faculty of Electronic and Computer Engineering, University Technical Malaysia Melaka with the operating frequency of 2.4 GHz. The spatial diversity and polarization diversity are applied in measurement campaign to investigate the performance of the wireless MIMO channel. The data obtained from the measurement was post-processed using MATLAB software in order to calculate the MIMO channel capacity. The analysis focused on the effect of the MIMO channel capacity due to the proposed measurement setup configurations. The channel capacity was increased from 0.03 b/s/Hz to 0.09 b/s/Hz when polarization diversity is applied at both transmitter and receiver.
Acute effects of local vibration on the neuromuscular responses = Efeito agudo da vibração local sobre as respostas neuromusculares

The aim of this study was to evaluate acute neuromuscular responses to local vibrations (LV) exposure through monitoring of imposed acceleration. Nineteen healthy males (age = 22.43 ± 2.76 years; body mass = 76.4 ± 12.94 kg; height = 175 ± 6.76 cm) performed an elbow flexion isometric exercise (Scott bench) in two experimental conditions: simple isometric exercise (Control - CON) and vibrating isometric exercise (Local Vibration - LV; Frequency = 20.01 ± 0.13, displacement = 2 - 5 mm). Protocols consisted of 5 maximal voluntary contractions of 12 seconds each and five minutes of recovery between series with (LV) or without vibration (CON). During the exercise, individuals were seated on the bench with the dominant arm resting on the bench support at an approximate angle of 45o between shoulder flexion and the torso. Strength parameters (Rate of Force Development - RFD, p = .030; Peak Force - PF, p = .027; and Fatigue Index - FI, p = .001) significantly increased in LV compared to CON. For EMG parameters, significant changes were only observed for highest value of increase rate of the EMG signal - RER (p = .041), median frequency of EMG signal between peak force and force at the end of the isometric action - MFFbic (p = .045) (agonist) and root mean square of EMG signal of peak force at the end of the isometric action - RMSFtric (p <.001) (antagonist). The addition of local vibrations in resistance training induced an increase in maximal strength, explosive strength and reduced the capacity to sustain strength generation.
A Neighbourhood Search Approach For Solving Large Scale Mixed-Integer Non Linear Programming Problems

The mixed-integer nonlinear programming problems addressed in this paper are large-scale, highly combinatorial and highly nonlinear problems. They have a structure characterized bya subset of variables restricted to assume discrete values, which are linear and separable from the continuous variables. The strategy of releasing nonbasic variables from their bounds, combined with the “active constraint” method, has been developed. This strategy is used to force the appropriate non-integer basic variables to move to their neighbourhood integer points. Succesful implementation of these algorithms was achieved on various test problems.
The dependence of high-precipitation supercells on preexisting airmass boundaries: a targeted modeling study

Severe and hazardous weather is often observed with and correlated to the presence of supercell thunderstorms. In fact, it is generally assumed that supercells are responsible for a significant amount of the severe weather and damage which results from thunderstorms (Moller et al. 1994; Doswell 2001). Three morphologies of supercells are recognized (Moller et al. 1994): low-precipitation, classic, and high-precipitation. Classic supercells are best known for their propensity toward tornado production and have therefore dominated the literature on supercells; however, it is postulated that highprecipitation (HP) supercells are the most commonly observed supercell morphology in the United States (Moller et al. 1994). In addition to their abundance, HP supercells pose the threat of flash flooding and large amounts of significantly severe (diameter ≥ 5 cm) hail (Nelson 1987), which are both significant hazards to life and property.
Preparation and Thermal Properties of Eutectic Hydrate Salt Phase Change Thermal Energy Storage Material

In this study, a new cold storage phase change material eutectic hydrate salt (K2HPO4·3H2O–NaH2PO4·2H2O–Na2S2O3·5H2O) was prepared, modified, and tested. The modification was performed by adding a nucleating agent and thickener. The physical properties such as viscosity, surface tension, cold storage characteristics, supercooling, and the stability during freeze-thaw cycles were studied. Results show that the use of nucleating agents, such as sodium tetraborate, sodium fluoride, and nanoparticles, are effective. The solidification temperature and latent heat of these materials which was added with 0, 3, and 5 wt% thickeners were −11.9, −10.6, and −14.8°C and 127.2, 118.6, 82.56 J/g, respectively. Adding a nucleating agent can effectively improve the nucleation rate and nucleation stability. Furthermore, increasing viscosity has a positive impact on the solidification rate, supercooling, and the stability during freeze-thaw cycles.
IMPACT OF SALINE CONDITIONS AND NITROGEN FERTILIZATION ON CITRUS PRODUCTION AND GAS EXCHANGES

In two simultaneous experiments, we evaluated the impact of brackish irrigation water and nitrogen (N) fertilization on the production of citrus (scion-rootstock combinations) and its associated gas exchanges. These experiments were conducted at the Campus of Federal University of Campina Grande, Brazil in a protected environment (shade screens on the sides) using drainage lysimeters. Experiment I used a randomized block design (3 replicates), in a 5 × 3 factorial arrangement, corresponding to five water salinity levels (0.6, 1.2, 1.8, 2.4, and 3.0 dS m -1 ) and three scion-rootstock combinations: RS1- Common Sunki mandarin (TSKC) × Poncirus trifoliata English (TRENG) - 256; RS2- Common Rangpur lime (LCRSTC); and RS3- TSKC × (Rangpur lime (LCR) × P. trifoliata (TR)) - 059; with Mimo do Ceu orange as the scion variety. Experiment II used a randomized block design (3 replicates), in a 3 × 2 factorial arrangement, corresponding to the three scion/rootstock combinations and two nitrogen (N) doses (100 and 200 mg kg -1 of soil). Plants were irrigated with water of 3.0 dS m -1 . For both experiments, gas exchanges and mean mass of fruits were evaluated at harvest. Gas exchanges were inhibited in plants under saline stress. Plants grafted with Common Rangpur lime showed greater production potential than did the other genotypes studied, even under brackish water conditions.
Numerical Simulation of Organised and Self-Organised Separated Flows in the Framework of Multiblock Computational Technologies

Abstract : The vortex intensification mechanism of heat transfer on the dimpled surfaces and crossed flow control of the bodies with additional construction elements like forward disks and vortex cells is analyzed by numerical methods. Self-organizing 3D vortex structures generating within dimple enhance the heat transfer from the wall and the effect on the boundary layer by bleeding-suction or rotating central body of the vortex cell results in diminishing of the separation effect influence accompanied by the reduction of the body drag and increasing of lift force. 3D vortex like toroid generated in the gap between forward disk and leading body edge is responsible for the pressure deficit at this region and as a sequence additional thrust that almost compensates the forward disk drag Vortex strain at the forward separation region at the angle of attack different from zero causes the effect of head stability for the cylinder with forward disc
Synthesis of Polypyrrole Using Ammonium Peroxy Disulfate (APS) as Oxidant Together with Some Dopants for Use in Gas Sensors

Polypyrrole (Ppy) was synthesized using Ammonium Peroxy Disulfate (APS) as oxidant in a standard ratio of monomer to oxidants at 5℃. Attempts were made to increase the electrical conductivity by using various dopants viz. Lithium per Chlorate (LiClO4), para-Toluene Sulfonate (p-TS) and Napthalene Sulfonic acid (NSA). The materials were characterized using FTIR, X Ray diffraction and SEM. The electrical conductivity was measured by two probe method and was found to be in the range of 10-3 S/cm. Thin films of these preparations were casted on the interdigited electrodes to study the detection of gas such as ammonia. It was found that for the pure Ppy when ammonia gas was allowed to flow in, there was a sudden increase in the current, which decreased rapidly when gas was stopped. However when Ppy doped with p-TS, NSA and LiClO4, the trend was reversed.
The Relative Efficiency in the Blending of Strategic Dimensions Utilized in the Generation of Customer Satisfaction in the LTL Motor Carrier Industry

This preliminary study utilizes a data envelopment methodology to assess the strategic orientations of LTL motor carriers and their impact on customer satisfaction and firm profitability. Strategic orientations are described in terms of seven dimensions previously identified in the motor carrier literature. The study demonstrates that there are "best practice" configurations of the intensities of these strategic dimensions that most efficiently generate the maximum levels of customer satisfaction and perceived levels of service quality. It is shown how the data envelopment methodology provides motor carriers with a means of benchmarking their strategic orientations as well as identifying the competitors against whom such benchmarking should occur.
Post-traumatic stress disorder treatment with virtual reality exposure for criminal violence: a case study in assault with violence

Abstract Exposure to criminal violence is associated with mental health problems, such as depression, substance use and abuse. However, one of the most important psychological problems linked with victims of violence is post-traumatic stress disorder (PSTD). In Mexico, according to the ENSI-5 in 2009, 11% of the population over 18 years of age experienced a crime. One in four of those who were victims of violence develop PSTD symptoms. Due to this socially relevant problem and based on the efficacy of previous virtual reality (VR) clinical applications for combat-related PSTD, our group developed four VR scenarios to treat victims of criminal violence. Data obtained from a case study of a person who experienced assault with violence showed significant changes through reduced levels of anxiety and PTSD symptoms, illustrating the effectiveness of such treatment.
SUPERMODEL ANALYSIS OF THE HARD X-RAY EXCESS IN THE COMA CLUSTER

The Supermodel (SM) provides an accurate description of the thermal contribution by the hot intracluster plasma which is crucial for the analysis of the hard excess. In this paper, the thermal emissivity in the Coma cluster is derived starting from the intracluster gas temperature and density profiles obtained by the SM analysis of X-ray observables: the XMM-Newton temperature profile and the ROSAT brightness distribution. The SM analysis of the BeppoSAX/Phoswich Detector System (PDS) hard X-ray (HXR) spectrum confirms our previous results, namely, an excess at the confidence level (c.l.) of ∼4. 8σ and a nonthermal (NT) flux of (1.30 ± 0.40) × 10−11 erg cm−2 erg cm−1 in the energy range 20–80 keV. A recent joint XMM-Newton/Suzaku analysis reports an upper limit of ∼6 × 10−12 erg cm−2 erg cm−1 in the energy range 20–80 keV for the NT flux with an average gas temperature of 8.45 ± 0.06 keV and an excess of NT radiation at a c.l. above 4σ, without including systematic effects, for an average XMM-Newton temperature of 8.2 keV in the Suzaku/HXD-PIN FOV, in agreement with our earlier PDS analysis. Here we present a further evidence of the compatibility between the Suzaku and BeppoSAX spectra, obtained by our SM analysis of the PDS data, when the smaller size of the HXD-PIN FOV and the two different average temperatures derived by XMM-Newton and by the joint XMM-Newton/Suzaku analysis are taken into account. The consistency of the PDS and HXD-PIN spectra reaffirms the presence of an NT component in the HXR spectrum of the Coma cluster. The SM analysis of the PDS data reports an excess at c.l. above 4σ also for the higher average temperature of 8.45 keV thanks to the PDS FOV being considerably greater than the HXD-PIN FOV.
The influence of bahiagrass, tillage, and cover crops on organic vegetable production and soil quality in the southern coastal plain.

Conventional farming utilizing bahiagrass (Papsalum notatum Flugge) in rotation with crops has been shown to increase yield, improve soil quality, and decrease weed and disease pressure. Organic production systems in the Southern Coastal Plain are challenged with limited soil fertility and a wide array of insect, disease, and weed pests. The purpose of this study was to investigate the influence of sequential years in bahiagrass and tillage (conventional and conservation) on organic vegetable yield and soil indices. After 0-4 years in bahiagrass, a crop rotation of rye and oats (winter cover crop), bush beans (spring vegetable crop), soybean (summer cover crop), and broccoli (fall vegetable crop) was implemented. Vegetable crop yields, plant biomass, plant C and N, and soil C, N, and P were measured for the four crops in the rotation over a three year period. Two years or more of bahiagrass prior to initiating the vegetable crop rotation showed positive effects on vegetable crop yields and soil quality parameters. Tillage treatments did not have a consistent effect on measured parameters. Soil C was not impacted by years in bahiagrass but was influenced by years of crop production. Potential soil N and P mineralization indicated an increase of soil organic fractions with years in bahiagrass. Available N increased after cover crops, and available P decreased with increasing years in bahiagrass.
Copper bioremoval by novel bacterial isolates and their identification by 16S rRNA gene sequence analysis

Copper-tolerant bacteria were isolated from soil samples taken from a region where metal industries are located. After selecting 2 isolates with relatively higher bioremoval efficiency, the effects of increasing copper concentration, pH, and temperature on the bioremoval efficiency of the growing isolates were determined. Strain N1c and strain N5a showed maximal bioremoval efficiency of 82% and 75%, respectively, in 20 mg/L copper-containing medium at pH 6.8 and 30 °C. Although the isolates did not grow well at pH 5, a low amount of copper was removed at pH 5. Slow growth of N5a at pH 5 allowed for 26% copper removal at hour 80 of incubation. Optimal copper bioremoval of the cells occurred at pH 6.8 and 30 °C. When grown at 37 °C under aerated conditions, N1c showed 31.7% bioremoval in the presence of 100 mg/L copper, and N5a was much more resistant to copper compared to N1c and E. coli. The isolates were identified by 16S rRNA gene sequence analysis. The 16S rRNA gene sequence of N5a showed 96%-97% similarity to Pseudomonas stutzeri and other Pseudomonas spp. The 16S rRNA gene sequence of N1c was 96% similar to Achromobacter sp. , Alcaligenes sp. , and a novel genus, Collimonas.
A Wrinkle in Time: Premature Aging in HGPS and RD

Summary The aging process can be accelerated by numerous cellular and molecular variables. Progeroid syndromes are one such example. The phenotypes of Hutchinson-Gilford Progeria Syndrome (HGPS) and Restrictive Dermopathy (RD) are both caused by an irregular pathway of the processing of prelamin A to mature lamin A, an integral component of the nuclear lamina. In wild-type cells, prelamin A undergoes farnesylation followed by cleavage that is carried out by the enzyme Zmpste24. A 50 amino acid deletion in the LMNA gene found in HGPS patients eliminates the cleavage site in prelamin A, causing an accumulation of farnesylated prelamin A. The buildup of this protein, known as progerin/LA� 50, occurs at the nuclear rim. In RD, nonfarnesylated and farnesylated prelamin A build up due to a deficiency in the Zmpste24 cleaving enzyme. In both syndromes, however, the accumulation of the different forms of prelamin A causes nuclear shape abnormalities and leads to phenotypes resembling premature aging. Currently, there are no known cures for HGPS and RD. However, FTIs and gene therapy are being studied as possible treatments. With continued research, more can be learned about the normal aging process, which could be applied in understanding progeroid syndromes and developing alternative treatments.
Soft Skills - An Important Key for Employability in the "Shift to a Service Driven Economy" Era

The shift from production to a service driven economy in recent years has increased the importance of soft skills among graduates in general and IT (Information Technology) in particular. While a decade ago the market requirements focused mainly on the candidate's technical expertise, currently there is an increased attention to the soft skills as well. This study that maps the real market soft-skills' requirements, was initiated due to employers' complains about the lack of soft skills among IT graduates. As part of the study 2000 IT classified advertisements that relate to IT professionals were analyzed. The study revealed that human interaction skills were high on the demand list (41.2% of the soft skills ads), common (or general skills) were in second place (22.8% of the ads), task interaction were third (20.2% of the ads) and organization skills were the least requested (15.8%).
Design a Model to Assess CRM Maturity in the Organization Using AHP

According to different nature of work in various companies, the essential step in implementation of optimal customer relationship management is identifying factors affecting CRM performance and indicators related to each factor. Therefore in this study, in order to assess the maturity of organization in the implementation of CRM, the main factors affecting CRM performance in the baby accessories industry were identified. Then the indicators explaining each factor were extracted and using Analytical Hierarchy Process (AHP) factors and identified indicators were ranked, and then the maturity status of the studied organization were analyzed in relation to CRM implementation. According to new and valid ideas, the main factors affecting the assessment of organizational maturity in CRM implementation are defined by three factors of processes, human resources and technology. The main factors affecting the CRM implementation were prioritized and also indicators related to the three main factors in line with the successful implementation of CRM were ranked. In order to assess the maturity of organization in CRM implementation, the binominal test was used. Except for the indicator of information technology and knowledge management which is lower than the given value for maturity level of the organization (12.5), other indicators such as strategy, organizational processes, organizational culture, human resources and change management, the studied organization in baby accessories industry has matured in CRM implementation.
The effects of green manure (Sesbania rostrata) on the growth and yield of rice

Green manuring with an N2-fixing legume crop can meet a substantial portion of rice N requirement and provide organic matter to wetland rice soils to maintain soil fertility. Organic-N fertilizers in the form of flood-tolerant, leguminous, stem-nodulating Sesbania rostrata can be useful alternatives to resource- poor rice farmers if applied as green manure. Therefore, the accumulation of fixed N by this green manure, their effect on the performance and yield of rice was examined. Firstly, root and/or stem nodulation, nitro- gen fixation (acetylene-reducing activity), growth and N accumulation of S. rostrata as affected by inocula- tion site were studied in a pot experiment. The growth and N accumulation of S. rostrata in stem inocula- tion treatment was the highest. Therefore, stem inoculation method was used for growing S. rostrata to incorporate into the rice soils for the second experiment. In the second experiment, the effects of S. ros- trata green manure application on the growth and yield of rice were studied. Green manure treatments (2 and 4 plants pot -1 ) were compared to urea treatments (40 and 80 kg N ha -1 ) and no application treatment. Green manure treatments increased dry matter weight and grain weight of rice significantly over urea and no application treatments. All green manure treatments increased N uptake of the plant. It can be con- cluded that incorporation of green manure legumes can add large amount of biologically fixed N to rice soils. The effective utilization of biomass produced by the stem-nodulating S. rostrata could be an eco- nomically viable component of integrated nutrient management for increasing the yield components and yield of rice per unit area.
Post-merger returns in frontier markets, or how we learned to stop worrying and love the acquirers

This study presents the results from a comprehensive out-of-sample test of long-run returns following mergers and acquisitions (M&As). Using a unique sample from 23 frontier markets of almost 800 transactions conducted during the years 1992 to 2016, we implement both cross-sectional tests and time-series examinations based on a calendar-time portfolio approach. Contrary to evidence from developed markets, the M&As in these frontier markets do not lead to abnormal underperformance of acquirers, regardless of whether they paid for the acquisition with cash or stock. The results are robust to many considerations, including subsample and subperiod analysis, alternative formation periods, different portfolio construction approaches.
Regularized Minimum Length Method in Scattered Data Interpolation

In an attempt of accumulating more experiences of interpolating scattered data using the minimum length method, this study chooses new kernel functions from the machine learning technique to implementing this minimum length method. But, consulting with the regularization theory, a regularized minimum length method is created by solving coefficient of it in a penalized least squares approximation problem. The purpose of creating this regularized minimum length method is responding to a pilot observation finding the instability of original minimum length method under dense interpolation points. Testing the regularized minimum length method finds that applying it is time-saving but its performance is comparable to the radial point interpolation with polynomial reproduction. Inverse multiquadric and rational quadric kernel functions are two preferred kernel function to perform the regularized minimum length method. In conclusion, the proposed regularized minimum length method can be a useful scattered data interpolation method.