Miracle-dz/UniFAR-FTUs huggingface dataset:
Theoretical Investigation over the Effects of EGR, Fuel Reforming and Compression Ratio on the HCCI Engine Operation Fuelled with Ethanol

Abs tract HCC I engines have great potentials in high effic iency with ultra-low NO and particulates emissions and high flexibility in using various fuels. They operate on the basis of auto-ignition and therefore the fuel chemical kinetic is the main ignition controller. Thus initiation of combustion is a determining parameter in the prediction of combustion behavior. The main focus of the present study is to comprehensively investigate the impact of exhaust gas recirculation, fuel reforming and compression ratio on the combustion behavior of HCCI engines using ethanol as fuel. Results show that the increase of EGR delays the ignition timing, slows down the combustion reaction rate and reduces the temperature and pressure in cylinder. Also associating with the effect of exhaust gas fuel reforming, it is shown that hydrogen in the form of reformed gas helps in lowering the intake temperature required for stable HCCI operation. Also, the addition of hydrogen advances the start of combustion in the cylinder. Consequently, it is elucidated that increasing the compression ratio results in advancing the ignition timing, decreasing the burn duration and increasing the temperature and pressure. It is worth noting that the obtained results from the present model have the great compatibility with experimental data.
Wastewater treatment performances of horizontal and vertical subsurface flow constructed wetland systems in tropical climate

The study was carried out in 4 concrete beds: two vertical subsurface flow beds (dimension of 1x1.4 x 0.6 m 3 ) and two horizontal subsurface flow beds (dimension of 0.6 x 2.3x 0.6 m 3 ) planted with Cyperus alternifolius L. Under the average wastewater temperature of 27°C, the hydraulic loading rates (HLR) were varied from 5 to 20 cm/d in order to obtain the optimum operating conditions and compare the removal efficiency. The wastewater was intermittently fed into the vertical subsurface flow beds (5 minutes on and 55 minutes off), and continuously into the horizontal subsurface flow beds. The maximum removal efficiencies were found at the lowest hydraulic loading rate for both systems. The horizontal subsurface flow system had a higher removal rate than the vertical subsurface flow system in terms of COD (the removal rates at 5-20 cm/d were 9.6-33.9 g/m 2 .d). The vertical subsurface flow system showed higher removal efficiency for TKN and NH 4 + -N, in every hydraulic loading rate and the removal rates for TKN and NH 4 + -N were 0.4-1.1 g/m 2 . d, respectively. Furthermore, it was found that the uptake of N by plants in the horizontal flow system was higher than in the vertical flow system for every hydraulic loading rate (HLR) but the loss of N via adsorption/denitrification was higher in the vertical flow system than in the horizontal flow system, at 20 cm/d HLR. The removal rate constants in the horizontal subsurface flow system for COD and NH 4 + -N were 0.0166 and 0.0188 m/d and 0.0204 and 0.0287 m/d for the vertical subsurface flow system, respectively.
Using social media data for online television recommendation services at RTÉ Ireland

Raidió Teilifís Éireann (RTÉ) is the public service television and radio broadcaster in Ireland. Through on demand video services, RTÉ allows their users to catch up on television broadcasts via the RTÉ Player. The company interacts with their users by means of social media platforms such as Twitter, Facebook and YouTube. Aiming to improve user engagement and in order to deal with the potential information overload caused by a broad catalogue such as RTÉ’s, a recommendation service would be a desirable feature for the RTÉ Player. However, the distinctive requirements of this use case, such as (a) lack of ratings, (b) lack of user sessions data, and (c) limited lifespan of items (i.e., available videos), keep us from applying traditional recommendation approaches. Yet, we believe that immersed within social media data, there is valuable information about user viewing preferences, and that this information can be used as input for Recommendation Services. This paper examines the use of social media data for personalization in the RTÉ industrial use case, giving special focus to the use of Twitter data for Recommendation Systems.
Effects of Continuous Ligth and Darkness on the Total Lipid Amounts of Achroia grisella (Lepidoptera: Pyralidae)’s Different Ages Adults

Achroia grisella (kucuk kovan guvesi) aricilikta peteklere zarar veren bir turdur. Bu turun larvalari kovanlarda ciddi zararlara yol acarlar. Bu bocekle yapilacak mucadelede ve laboratuvar calismalarinda biyolojik ozelliklerinin bilinmesi onemlidir. Fotoperiyot canlilarda bircok metabolik ve fizyolojik faaliyeti etkiler. Bu calismada, devamli aydinlik (DA) ve devamli karanligin (DK) farkli yaslardaki A. grisella (kucuk kovan guvesi) erginlerinin total lipit miktarina etkisi arastirildi. Denemeler 28 ± 2 °C ve % 65 ± 5 nisbi nem iceren laboratuvar sartlarinda yapildi. Analizler icin stoklanan orneklerdeki total lipit miktarinin belirlenmesinde Van Handel [16]’in gelistirmis oldugu yontem esas alindi. Farkli fotoperiyot rejimleri 40 wattlik floresans ampullerle saglandi. Her iki fotoperiyot rejiminde 100 mg ergindeki lipit miktari her iki eseyde de yasla birlikte azalma gosterdi. Her iki fotoperiyot rejiminde yetistirilen erginlerde disilerin total olarak erkeklerden daha fazla lipit icerdigi tespit edildi
Phylogeography of the Land Snail Eobania vermiculata (O.F. Müller, 1774) (Gastropoda: Pulmonata) along the Croatian Coast and Islands

Eobania vermiculata [11] , is a typical Mediterranean species of large land snails. Nonindigenous populations of this species, however, are already established in the USA, Australia and elsewhere in the world, where this species is considered to represent a potentially serious threat as a pest and invasive species. The aims of this study were: 1) to determine the pattern of genetic variation within the Croatian E. vermiculata populations based on analyses of sequence diversity of two mitochondrial genes, 16S rDNA and the cytochrome oxidase I (COI), and 2) to shed more light upon the phylogeography of E. vermiculata in this area. Seventy-seven specimens of land snail Eobania vermiculata were sampled at 19 sampling sites along Croatian coastal region and islands. The partial 16S rRNA gene sequences (379 bp) grouped into 14 haplotypes, whereas the partial COI gene sequences (523 bp) grouped into 13 haplotypes. The overall population is characterized by relatively high haplotype (gene) diversity (0.719±0.042 for 16S rDNA and 0.869±0.020 for COI). Demographic Fu F’s tests and Tajima's D value indicated no significant change in the population size, thus suggesting long historical presence of E. vermiculata in this region. Maximum likelihood phylogenetic analysis, Bayesian inference and median joining haplotype network showed a genetic splitting of Croatian 16S rRNA and COI sequences, with a clear distinction between south-Adriatic and north-Adriatic haplotypes. A possible explanation for the observed phylogeography of E. vermiculata, could be related to the climate change, glaciations and the Adriatic Sea level oscillations during the Quaternary.
Differences in Wage Distributions between Natives, Non-Refugees, and Refugees

This study examines differences in wage distributions between natives, non-refugees, and refugees in Sweden. We find that the wage differentials between natives and non-refugee immigrants decrease across the distribution, while those between natives and refugee immigrants increase. There is evidence of a glass ceiling effect for refugee males in Sweden, and we also find evidence of a glass ceiling effect for native-born women and non-refugee women in the Swedish labor market in comparison with native-born and non-refugee men, respectively. In addition, there is evidence of a double disadvantage effect for refugee women in the Swedish labor market.
Analysis of the relationship between working capital policy and operating risk: an empirical study on Jordanian industrial companies

The study analyzes the working capital management practices and their impact on profitability and risk of industrial Jordanian firms for the period of 2004 to 2007. The total sample of the study consists of 59 industrial firms listed on Amman Stock Exchange. The working capital management practices examine the impact of aggressive/conservative working capital investment and financing policy and analyze through cross-sectional regression models the relationship between working capital policies and profitability as well as risk of the firms. Efficient management of working capital is a fundamental part of the overall corporate strategy aiming to create the shareholders’ value. Firms try to keep an optimal level of working capital that maximizes their value. The optimal level of working capital is determined to a large extent by the methods adopted for the management of current assets and liabilities. It requires continuous monitoring to maintain proper level in various components of working capital, i.e. cash receivables, inventory and payables, etc. The result indicates a negative relationship between the profitability measures of firms and degree of aggressiveness of working capital investment and financing policy. The firms yield negative returns if they follow an aggressive working capital policy. Moreover, the present study validates the findings of Carpenter and Johnson (1983) that there is no relationship between the level of current assets and liabilities and risk of the firms.
VARIOUS METHODS OF NEWS PERSONALISATION

The number of online journals has increased in recent years with the increasing popularity of the Internet. It is important to offer user tools that facilitate faster and more accurate access to articles of interest in digital newspapers. In this paper we have taken a review of various methods of news personalization. These methods personalize relevant news to users according to profiles of their visits. These News Personalization systems offer recommendations, usually based on content similarity to previous visits by the user that is the content based approach or on news items visited by similar users that is collaborative filtering.
Production of Ni(OH)2 nanosheets by liquid phase exfoliation: from optical properties to electrochemical applications

Here we demonstrate that liquid phase exfoliation can be used to convert layered crystals of nickel hydroxide into Ni(OH)2 nanosheets in relatively large quantities and without the need for ion intercalation. While other procedures require harsh synthesis conditions and multiple reaction steps, this method involves ultrasonication of commercially available powders in aqueous surfactant solutions and so is relatively mild and potentially scalable. Such mild exfoliation is possible because the surface energy of Ni(OH)2, as measured by inverse gas chromatography, is relatively low at ∼70 mJ m−2, similar to other layered materials. TEM, AFM, XPS and Raman spectroscopy show the exfoliated nanosheets to be relatively thin (mean ∼10 monolayers thick) and of good quality. Size selection by liquid cascade centrifugation allowed the production of samples with mean nanosheet lengths ranging from 55 to 195 nm. Optical measurements on dispersions showed the optical absorption coefficient spectra to be relatively invariant with nanosheet size while the scattering coefficient spectra varied strongly with size. The resultant size-dependence allows the extinction spectra to be used to estimate nanosheet size as well as concentration. We used the exfoliated nanosheets to prepare thin film electrodes for use in supercapacitors and as oxygen evolution catalysts. While the resultant capacitance was reasonably high at ∼1200 F cm−3 (20 mV s−1), the catalytic performance was exceptional with currents of 10 mA cm−2 observed at overpotentials as low as 297 mV, close to the state of the art.
Identification of coupling- and repulsion-phase markers in rice for brown planthopper resistance genes using F 2 S of IR 50 X CO 46

Brown planthopper, Nilaparvata lugens Stal (Homoptera: Delphacidae) is one of the most threatening pests, often significantly reducing the rice yield. The breeding of resistant cultivar has been the most effective way of controlling this pest. Recent advancements in DNA marker technology together with the concept of marker-assisted selection (MAS) provide new solutions for selection of more durable brown planthopper (BPH) resistant genotypes in rice. F2s of a cross between IR 50 and CO 46 and their susceptible and resistant parents were used for the present study. In bulk segregant analysis, random amplification of polymorphic DNA (RAPD) primer, OPC 11 (5’AAAGCTGCGG 3’) showed co-dominant banding pattern, which amplified a susceptible phenotype specific marker OPC11856 associated with repulsion phase. It also amplified resistant phenotype specific markers, OPC 11817 which are associated in coupling phase to the resistant allele. The OPA11817 RAPD marker could be used in a cost effective way for marker assisted selection of BPH resistant rice genotypes.
Effects of simultaneity on testing Granger-causality: A cautionary note about statistical problems and economic misinterpretations

Interpreting Granger causality as economic causality implies that the underlying VAR model is a structural economic model. However, this is wrong if simultaneity occurs. Magnitude and stability of possible errors are analysed in a simulation study. It is shown that economic misinterpretations of tests of Granger causality can occur with probability one for realistic parameter values. Furthermore, the power of the test can be rather low even with a sample size of T=50.
Empirical Modeling of Some Physical Properties of Tenera Nuts on Cracking Energy

This paper attempts to model the effect of some physical properties such as mass, shell thickness and dimensions of Tenera nuts on cracking energy. The relationship would aid in the design of a nut cracker for effective cracking of the nuts to release high percentage of whole kernels. In this study, dried palm nuts of Tenera variety having moisture content of 4.84% d.bwere used. These nuts were classified into six size ranges. Each nut in each size range had it mass weighed; minor diameter, intermediate diameter and major diameter measured and recorded before it was subjected to impact. The shell thickness of each nut that cracked and releases whole kernel after impact in a Test rig was also measured and recorded. Result revealed that nut mass ( m
' s personal copy A complete reference of the analytical synchrotron external shock models of gamma-ray bursts

Gamma-ray bursts are most luminous explosions in the universe. Their ejecta are believed to move towards Earth with a relativistic speed. The interaction between this ‘‘relativistic jet’’ and a circumburst medium drives a pair of (forward and reverse) shocks. The electrons accelerated in these shocks radiate synchrotron emission to power the broad-band afterglow of GRBs. The external shock theory is an elegant theory, since it invokes a limit number of model parameters, and has well predicted spectral and temporal properties. On the other hand, depending on many factors (e.g. the energy content, ambient density profile, collimation of the ejecta, forward vs. reverse shock dynamics, and synchrotron spectral regimes), there is a wide variety of the models. These models have distinct predictions on the afterglow decaying indices, the spectral indices, and the relations between them (the so-called ‘‘closure relations’’), which have been widely used to interpret the rich multi-wavelength afterglow observations. This review article provides a complete reference of all the analytical synchrotron external shock afterglow models by deriving the temporal and spectral indices of all the models in all spectral regimes, including some regimes that have not been published before. The review article is designated to serve as a useful tool for afterglow observers to quickly identify relevant models to interpret their data. The limitations of the analytical models are reviewed, with a list of situations summarized when numerical treatments are needed. 2013 Elsevier B.V. All rights reserved.
Modification and experimental research on vortex tube

Vortex tube (VT) is a simple energy separating device which is compact and simple to produce and to operate. Although intensive research has been carried out in many countries over the years, the efficiency is still low. In order to improve the energy separate efficiency of vortex tubes, three innovative technologies were applied to vortex tubes. A new nozzle with equal gradient of Mach number and a new intake flow passage of nozzles with equal flow velocity were designed and developed to reduce the flow loss. A new kind of diffuser invented by us was installed for reducing friction loss of air flow energy at the end of the hot end tube of vortex tube, which can greatly improve the performance of vortex tube. The experiment results indicated that these modifications could remarkably improve the performance of vortex tube. The developed vortex tube was not only superior to the conventional vortex tube but also superior to that made by two companies in world under big cold gas mass flow ratio. 2007 Elsevier Ltd and IIR. All rights reserved.
Additive Manufacturing with Composites for Integrated Aircraft Structures

The combination of additive manufacturing (AM) with advanced composites unlocks potentials in the design and development of highly integrated lightweight structures. This paper investigates two design potentials where the combination of AM and carbon fiber prepreg technology is applied to honeycomb sandwich structures: (i) Reduction of number of parts: The use of selective laser sintered cores allows the integration of various functions into one single part. These include structural as well as tooling, positioning and assembly functions. (ii) Tailored mechanical performance: With AM it is possible to adapt the mechanical properties of the core according to local load requirements. These potentials are demonstrated using the example of the development of an aircraft instrument panel. The approach of combining AM with advanced composites is evaluated by assessing the weight and the number of parts for the demonstrator panel compared to a state-of-the-art aluminum machined instrument panel. Weight savings of 40 % and parts reduction by 50 % indicate that the technology is competitive for complex low volume parts.
The Role of Goods‐Trade Networks for Services‐Trade Volume

Abstract In this paper, we address the role of countries’ goods-trade networks for their services-trade volume. The paper employs a large cross section of bilateral trade data on aggregate cross-border goods and services sales and illustrates that the depth and overlap of two countries’ services networks induce a positive direct impact on their services-trade volume. The evidence takes into account that goods trade flows and networks are potentially endogenous so that the estimated direct effects support a causal interpretation. We find that the magnitude of the multilateral goods-trade network effect on the bilateral services-trade volume is much larger than that of bilateral goods-trade volume.
DETERMINANT FACTORS OF SPATIAL DATA SHARING OF LOCAL SPATIAL DATA INFRASTRUCTURE IN INDONESIA

This study is based on the phenomenon of the weakness of local government’s response to the national program of Spatial Data Infrastructure for the effective spatial data sharing in Indonesia. This study is investigation of determinant factors of spatial data sharing for local Spatial Data Infrastructure in Indonesia. The purpose of this study is to describe the spatial data-sharing model of Local SDI in Indonesia. It was conducted in West Java Province, Bogor Regency, and Bogor City. Sequential exploratory design method consisting of interview and questionnaire were used in this research. An in-depth interview was used to get a response from 10 participants among IT or GIS staff and head of the department. A total of 75 respondents were involved in questionnaire survey. Content’s analysis was used to measure interview data while Partial Least Square analysis was used to measure questionnaire data. The fit items were chosen after validity and reliability measurement in the structural model analysis using Smart PLS. Hypothesis measurement found that Data sharing practice was significantly affected by the Organization and Technology aspect, but Data sharing practice was less significantly affected by Human Resource and Spatial Data. All R-Square value shows that the value is more than 50% on Technology aspect, Human Resource aspect, Spatial Data aspect, while the R-Square value on Data Sharing practice is 47.3%. Because the Human resource and Spatial data have the less significant effect on spatial data sharing, this research proposed awareness program and mentoring by National government to promote spatial data sharing support at the local SDI.Keywords: spatial data sharing, determinant factors, Partial Least Square (PLS)
Aerodynamic Characteristics and Longitudinal Stability of Tube Launched Tandem-Scheme UAV

Tube launched unmanned aerial vehicles (UAV) are often implemented with aerodynamic scheme with forward and rear wings (so-called tandem-scheme). Specificity of such UAV is that immediately after launch, they have a flight path in which wings are turned from position along the fuselage to flight position in which sweep angles are about zero. UAV aerodynamic characteristics for different wing rotation angles were researched by computational fluid dynamics (CFD) methods (Ansys 16 software). Quantitative results prove that UAV is unstable with wings rotation angles up to 60° because rear wings produce lift ahead of center of gravity. Therefore, low time of wings unfolding is required. For high angles of wings rotation (low sweep angles), UAV model is stable in a wide range of angles of attack. Local aerodynamic defects were found in the area of the rotation units of both wings. Longitudinal vortex along the left side of fuselage was observed, but it does not result in significant roll moment. Further research might include UAV dynamics modelling based on calculated aerodynamics characteristics or flight tests.
Insensitivity of proportional fairness in critically loaded bandwidth sharing networks

Proportional fairness is a popular service allocation mechanism to describe and analyze the performance of data networks at ow level. Recently, several authors have shown that the invariant distribution of such networks admits a product form distribution under critical loading. Assuming exponential job size distributions, they leave the case of general job size distributions as an open question. In this paper we show the conjecture holds for a dense class of distributions. This yields a key example of a stochastic network in which the heavy trac limit has an invariant distribution that does not depend on second moments. Our analysis relies on a uniform convergence result for a uid model which may be of independent interest.