Miracle-dz/UniFAR-FTUs huggingface dataset:
Langmuir adsortion isotherm with regular and irregular autoregressive error structures

The Langmuir isotherm is a nonlinear regression model, being one of the most applied in adsorption studies. In this type of study, the data are collected over time, which can provide correlated errors; in addition, the collection is not always done in an equidistant way, which may influence the estimation of model parameters. One way of modelling the dependent errors in a regression model is to use an autoregressive process that assumes that the observations are performed at equidistant intervals. However, the definition of the independent variable is often performed at irregular intervals, causing a reduction of information obtained from the dataset. One possible improvement in the adjustment quality of these models is the use of the irregular autoregressive process. The objective of this work was to compare the estimates of isotherm parameters with different irregular and regular autoregressive error structures, considering the positive autocorrelation in different sample sizes, error autocorrelation values and positioning of non-equidistant observations. It was found that there is a need to respect the assumptions of the model. The irregular autoregressive model is more appropriate because it is mostly more precise and accurate, especially when non-equidistance occurs in the initial third.
Experimental Investigation on Electric Current-Aided Laser Stake Welding of Aluminum Alloy T-Joints

In the present study, aluminum alloy T-joints were welded using the laser stake-welding process. In order to improve the welding quality of the T-joints, an external electric current was used to aid the laser stake-welding process. The effects of the process parameters on the weld morphology, mechanical properties, and microstructure of the welded joints were analyzed and discussed in detail. The results indicate that the aided electric current should be no greater than a certain maximum value. Upon increasing the aided electric current, the weld width at the skin and stringer faying surface obviously increased, but there was an insignificant change in the penetration depth. Furthermore, the electric current and pressing force should be chosen to produce an expected weld width at the faying surface, whereas the laser power and welding speed should be primarily considered to obtain an optimal penetration depth. The tensile shear specimens failed across the faying surface or failed in the weld zone of the skin. The specimens that failed in the weld of the skin could resist a higher tensile shear load compared with specimens that failed across the faying surface. The microstructural observations and microhardness results demonstrated that the tensile shear load capacity of the aluminum alloy welded T-joint was mainly determined by the weld width at the faying surface.
NADM: Neural Network for Android Detection Malware

Over recent years, Android is always captured roughly 80% of the worldwide smartphone volume. Due to its popularity and open characteristic, the Android OS is becoming the system platform most targeted from mobile malware. They can cause a lot of damage on Android devices such as data loss or sabotage of hardware. According to the predictive characteristics, machine learning is a good approach to deal with the number of new malwares increasing rapidly. In this paper, we propose Neural Network for Android Detection of Malware (NADM). The NADM performs an analysis process to gather features of Android applications. Then, these data will be converted into joint vector spaces, which to be input for the training part of deep learning process. Our classifier model can achieve a high accuracy system and has been applied in sProtect [15] on Google Play.
PHONETIC FACTORS IN /r/-LIAISON USAGE: A FIRST REPORT

Variability in /r/-liaison usage in non-rhotic accents of English has been explained by reference to linguistic, sociolinguistic and phonetic factors. This paper looks at two phonetic factors that might condition such variability: a) the type of vowel phoneme at the end of the syllable likely to make the link; and b) the presence/absence of /r/ at the beginning of that syllable. A corpus of Received Pronunciation (RP) English newscasts from the years 2004 and 2005 available from the BBC Learning English website [16] was investigated. Potential contexts were detected and analysed auditorily. The results show that intrusive /r/ is more frequent after back vowels than after central vowels and that the presence of /r/ in the syllable that would make the /r/-link does not seem to have a great effect on the presence of /r/-link.
Monetary Policy Design When Consumption Prices are Subsidized

Several theoretical studies suggest that price inflation targeting is the right design for a monetary policy. Experiences of several inflation targeters in the 1990s motivate this result. In particular, those countries attained substantial decline in output, inflation and interest rate fluctuations. Many other countries are in the process of adopting this monetary regime including emerging markets and developing countries despite their different historical experiences and economic environment. For instance, many of these countries face different market imperfections through sticky prices and government interventionism in setting prices in some markets. This paper uses structural general-equilibrium approach with price rigidity to test the premise that inflation targeting is welfare improving taking into consideration an environment where government subsidizes a share of private consumption expenditures. Our approach consists in estimating a fully fledged dynamic stochastic general-equilibrium model for fourteen emerging markets and developing countries. Then, a second order approximation of the model is applied to compare several hybrid Taylor rule’s specifications based on different definitions of inflation rates (CPI, and sectoral price indexes). Results show that strict CPI inflation targeting could be easily overcome by sectoral inflation targeting, output gap stabilization, or a combination of these. In addition, several cases exhibit lower performance of both CPI and core inflation stabilization, the two most common policies in modern Central Banks’ practices.
Key tree species for the golden‐headed lion tamarin and implications for shade‐cocoa management in southern Bahia, Brazil

The golden‐headed lion tamarin Leontopithecus chrysomelas occurs in the Atlantic forest of southern Bahia, Brazil, where shade‐cocoa agroforestry (known as cabruca) predominates. The economic decline of the cocoa industry has caused many landowners to convert cabruca into cattle pasture or diversify their plantations with other crops. These and prior anthropogenic disturbances such as habitat fragmentation are threatening lion tamarin persistence. For some lion tamarin groups, cabruca comprises a large part of their home range. Considering these factors, the maintenance of the biological diversity in cabruca favorable to golden‐headed lion tamarins is of considerable interest to their long‐term survival. Here we identify plant species that provide food and sleeping sites for the lion tamarins and examine their occurrence in cabruca plantations, in order to investigate alternatives for conservation management practices that benefit both lion tamarins and cabruca. We determined the total number of trees and the frequency of individuals and species used for food and sleeping sites by lion tamarins in Una Biological Reserve, Bahia, from 1998 to 2006. We used this information to compare the richness and frequency of use across habitats (cabruca, mature and secondary) and to create a ranking index considering various components of a tree species' utility to the lion tamarins. Lion tamarins used 155 tree species, 93 for food and 93 for sleeping sites. Fifty‐five species were ranked as ‘Extremely Valuable,’ eight as ‘Valuable’ and 92 as ‘Of Interest. ’ Of 48 families, Myrtaceae and Sapotaceae were used the most. Cabruca contained fewer individual trees used by lion tamarins, but the highest frequency of use per tree compared with other habitats, indicating the large influence of single trees in these plantations. Using the key tree species identified in our study in the management of cabruca would be of considerable benefit to the long‐term survival of lion tamarins
Responses of Physiological Traits of Maize to Water Deficit Induced at Different Phenological Stages

Twofieldexperimentswereconductedtoevaluatethephysiologicalresponsesofmaizeto� waterdeficitconditions. �Fivewaterregimes�(control,�waterdeficitfromV10�toV13,�V13�toV17,�V17� toblisterandblistertophysiologicalmaturity)�and�3�maizegenotypesincludingPioneer�30B80,�NK�40� andSuwan�4452�weretestedundermoderatewaterdeficit� (MWD). �Basedontheirbetterphysiological� performance,�NK�40�andSuwan�4452�werefurtherevaluatedunderseverewaterdeficit� (SWD)�levels� (control,�waterdeficitfromV10�toanthesis,�anthesistomilkandmilktophysiologicalmaturity). �The� omissionofirrigationinthemoderatea ndseverewaterdeficitregimesdecreasedthesoilwaterpotential� andresultedinasignificantdecreaseintherelativewatercontent�(RWC),�chlorophyllcontent,�leafarea� (LA)�anddrymatter�(DM)�accumulationcomparedtothecontrol. �AgreaterdecreaseintheRWC�(13.66� and�29.78%)�attheV17�andanthesisstages,�chlorophyllcontent�(12.75�and�49.44%)�attheV17�andlate� grainfillingstages,�LA�(50.01�and�36.64%)�attheV13�andmilkstagesandDM�(15.98�and�14.60%)�at� theV17�andlategrainfillingstageswasfoundundermoderateandseverewaterdeficit,� respectively. � ThemostsusceptiblestagetoMWDandSWDwastheV13�toV17�stageandtheanthesistomilkstage,� respectivelyintermsofgrainyieldreduction. �Afterrewatering,�theRWCfullyrecoveredorwasclose� tothecontrollevelunderbothwaterdeficitswhilerecoveryofchlorophyllwasrelativelyhigherinthe� moderatewaterstressregime. �Rewateringafterwaterdeficitatanearlystageresultedinarecovery� in��leafareabutrewateringafteranthesisfailedtorecoverleafareaunderbothexperiments. �NK�40� demonstratedbetterperformanceregardingsustainingarelativelyhigherRWCandchlorophyllcontent� and a higher yield under both stress environments compared to the other genotypes. The relative water content, chlorophyll content and grain yield showed negative relationships with the available soil water depletion�(%),�whilethegrainyieldshowedapositiverelationshipwiththerelativewatercontentand� chlorophyllcontentunderbothwaterdeficitexperimentswhichcanbeusedasanindexfordrought�
Influence of nozzle arrangement on flow and heat transfer characteristics of arrays of circular impinging jets

The effect of jet arrangements on flow and heat transfer characteristics was experimentally and numerically investigated for arrays of impinging jets. The air jets discharge from round orifices and perpendicularly impinge on a surface within a rectangular duct. Both the in-line and staggered arrangements, which have an array of 6×4 nozzles, were examined. A jet-toplate distance (H) and jet-to-jet distance (S) were fixed at H=2D and S=3D, respectively (where D is the round orifice diameter). The experiments were carried out at jet Reynolds number Re=5,000, 7,500 and 13,400. Temperature distributions on the impingement surface were measured using a Thermochromic Liquid Crystal sheet, and Nusselt number distributions were evaluated using an image processing method. The flow characteristics on the impingement surface were visualized using the oil film technique. The numerical simulation employed to gain insight into the fluid flow of jets between the orifice plate and the impingement wall was via computational fluid dynamics. The results reveal that the effect of crossflow on the impinging jets for the staggered arrangement is stronger than that in the case of in-line arrangement. In the latter case of in-line arrangement, the crossflow could pass throughout the passage between the rows of jets, whereas in the former case the crossflow was hampered by the downstream jets. The average Nusselt number of the in-line arrangement is higher than that of the staggered arrangement by approx. 13-20% in this study.
Images Pixel as Graphical Password Using Artificial Intelligence

We present a new security primitive based on hard Artificial Intelligence problems, namely, a novel family of graphical password systems built on top of Captcha technology. Graphical Password addresses a number of security problems altogether, such as online guessing attacks, relay attacks, and, if combined with dual-view technologies, shoulder- surfing attacks. Actually images as graphical password are used to secure the data with pixel representation of x and y coordinates. These security depends upon the pixel representation of the Images Graphical Password also offers a novel approach to address the well-known image hotspot problem in popular graphical password systems, such as PassPoints, that often leads to weak password choices.
Calidad de Datos en un Contexto de Big Data

In each of the phases of a Big Data analysis process, Data Quality (DQ) plays a key role. Given the particular characteristics of the data at hand, the traditional DQ methods, based on quality dimensions and metrics, must be adapted and extended, in order to capture the new characteristics that Big Data introduces. This paper dives into this problem, re-defining the DQ dimensions and metrics for a Big Data scenario, where the data arrives, in this particular case, as unstructured documents in real time, such as JSON objects. This general scenario is instantiated to study the concrete case of Twitter feeds. Further, the paper also describes the implementation of a system that acquires tweets in real time, and computes the quality of each tweet, applying the quality metrics that are defined formally in the paper. The implementation includes a web user interface that allows filtering the tweets, for example, by keywords, and visualizing the quality of a data stream in many different ways. Experiments are performed and their results discussed.
Research on Mechanical Product Design System Based on C-K Theory

In the machine tool manufacturing industry, most of the design is based on previous resources, in terms of similar structure; the traditional mechanical design takes the approach of repeated modeling, but this approach greatly limits the scope of the personnel involved in design activities. It costs a lot of labor in almost identical work. In response to this situation, this paper introduces C-K design theory, combined advanced design guideline and mechanical design process. Take the existing design rules, constraints, characteristics of models as available knowledge of knowledge space in C-K theory, and the initial structure created by design requirements and available knowledge of knowledge space as the initial concept of concept space. Expand concept space and knowledge space with the dividing, learning and reasoning in order to provide more available knowledge for serial design activities. The mechanical product rapid design system is developed on the Solidworks, and it will increase the reuse rate of enterprise resources, reduce the error rate in design activities, improve the product quality, and shorten the production cycle.
A Virtual Failure: Evaluating the Success of Nintendo's Virtual Boy

n 15 November 1994 Nintendo unveiled its newest video game console at the annual Shoshinkai Show. The Virtual Boy sported 3-D graphics in a unique tripodmounted unit that required gamers to immerse themselves in the dual-screen display. While Nintendo hoped that this system would be the next big thing in the gaming world, initial response was notably underwhelming, with reviewers noting a number of glaring problems inherent in the console’s design (Semrad). Despite an extravagant advertising campaign and revolutionary partnership deals, the system failed to take off with the general public. Games announced for the system at the May 1996 Electronic Entertainment Expo less than a year after the console’s launch were never released, with Nintendo quietly allowing the system to disappear without any formal announcement. Historical accounts of the Virtual Boy are even shorter than Nintendo’s support of the system, concisely dismissing it as a failure because of its lack of sales, which is generally attributed to problems of technical implementation and Nintendo’s preoccupation with the impending Nintendo 64 system. Regardless of the reason, the consensus among critics is that the system was an undeniable failure. Nintendo chairman Howard Lincoln put it simply: “[I]t just failed” (qtd. in Sheff 450). However, the technological and ideological goals of the system, to create a new immersive gaming platform with the utopian aspirations of virtual reality, have lived on far beyond the console’s mainstream presence. This attempt still resonates with diehard fans and collectors, who continue to flock to the system over a decade after its release, suggesting a cultural significance much larger than that implied by critics. These contradictory readings of the Virtual Boy suggest that the significance of technological “failures” and, even more broadly, the definition of failure itself are characterized by a negotiable fluidity that accommodates a variety A Virtual Failure: Evaluating the Success of Nintendo’s
ECG measurement parameters of athletes are reliable when made with a smartphone based ECG device

Athletic pre-participation cardiac screening including electrocardiogram (ECG) is a subject of controversy among sports medicine practitioners. Opponents of pre-participation ECG screening cite concerns regarding the cost and accuracy of the testing. Recently, a single lead ECG accessory has become available for use with smartphones. The purpose of this study was to evaluate the between and within rater validity and reliability of the Kardia device in recording the ECG parameters rate, rhythm, and PR, QRS, QT intervals. The ECG parameters recorded with the smartphone were also compared to same measures made using a 12 lead electrocardiograph. This investigation used a repeated measures cross-sectional design. The investigation was conducted in two separate phases using separate participant samples. Phase 1 (N=10) was used to determine the within rater reliability with the Kardia device. Phase 2 (N=12) was used to determine the reliability between the Kardia device and the 12 lead electrocardiograph. The between rater and between device reliability for the rate, QT interval and QRS duration parameters ranged good to very good (ICC = 0.667 – 0.981). The current investigation showed that the reliability of the ECG parameters measured using the smartphone technology ranged from good to very good. This paper serves as support for a technological advancement that will help advance the debate on the utility of ECG testing as part of the athletic pre-participation physical.
Coaxially Aligned Polyaniline Nanofibers Doped with 3-Thiopheneacetic Acid through Interfacial Polymerization

Coaxially aligned polyaniline (PANI) nanofibers doped with 3-thiopheneacetic acid (TAA) were chemically synthesized by the interfacial polymerization of aniline in the presence of TAA, using iron (III) chloride hexahydrate (FeCl3ċ6H2O) as the oxidant. The morphology, crystallinity, room temperature conductivity, and coaxial alignment of the PANI-TAA nanofibers were highly dependent on the organic solvent used for the interfacial polymerization, the oxidant, and also the molar ratio of the aniline to TAA. Hexane, diethyl ether, dichloromethane, chloroform, and acetone were used as the organic solvents, and chloroform proved to be the best solvent for the formation of PANI-TAA nanofibers. The redox potential of the oxidant is the key to controlling the morphology and diameter of the PANI-TAA nanofibers. The use of FeCl3 as the oxidant leads to the formation of thin (∼50 nm) PANI-TAA nanofibers, which increased in length, crystallinity, conductivity, and coaxial alignment as the molar ratio of TAA to aniline was increased from 0.1 : 1 to 1 : 1. By comparison, only granular PANI was obtained when ammonium persulfate (APS), which has a higher redox potential, was used as the oxidant. The doping function of TAA in the PANI-TAA nanofibers was confirmed by means of FTIR and UV-Visible spectroscopy.
A Study of Exploratory Analysis in Melodic Sonification with Structural and Durational Time Scales

Melodic sonification is one of the most common methods of sonification: data modulates the pitch of an audio synthesizer over time. This simple sonification, however, still raises questions about how we listen to a melody and perceive the motions and patterns characterized by the underlying data. We argue that analytical listening to such melodies may focus on different ranges of the melody at different times and discover the pitch (and data) relationships gradually over time and after repeated listening. To examine such behaviors in real-time listening to a melodic sonification, we conducted a user study employing interactive time and pitch resolution controls for the user. The study also examines the relationships of these changing time and pitch resolutions to perceived musicality. The results indicate a stronger general relationship between the time progression and the use of time-resolution control to analyze data characteristics, while the pitch resolution controls tend to have more correlation with subjective perceptions of musicality.
On the effects of using linguistic variables when assessing textual semantic similarity

Evaluating the quality of semantic similarity measures is often performed by computing the degree of correlation between the results obtained by means of an implementation of the given measure and ground truth datasets extracted from human judgments. In this paper we show that, by using linguistic variables for comparing semantic similarity measures and ground truth datasets, the human perception about the accuracy of a given semantic similarity measure can be notably improved. This is particularly relevant in scenarios where a high degree of granularity is not required.