Miracle-dz/UniFAR-FTUs huggingface dataset:
Trade-offs between the quality of service, computational cost and cooling complexity in interference-dominated multi-user SDMA systems

The future fifth generation (5G) systems will aim to design low-cost phased array base station antenna systems at mm-waves for simultaneous multiple beamforming with enhanced spatial multiplexing, limited interference, acceptable power consumption, suitable processing complexity, and passive cooling. In this study, a multi-user space division multiple access (SDMA) model is developed to investigate the trade-off between the quality of service (QoS), computational complexity in beamforming and cooling requirements for various use cases, and a number of users. The QoS at the user ends is rated by assessing the statistical signal-to-interference-plus-noise ratios (SINRs). Two beamforming algorithms, namely conjugate beamforming (CB) and zero-forcing (ZF), are considered and compared. Depending on the deployment scenario, rotated and optimised array layouts are proposed to be used in CB with the least computational complexity while providing relatively good QoS. Different reduced-complexity ZF algorithms are introduced as a compromise between the SINR performance and computational burden. The impact of the number of simultaneously served users on the thermal management in active integrated 5G base station antenna arrays is investigated as well.
Prediction of the length and width of quail eggs using linear regression analysis

Bulgular: Bıldırcın yumurta boyu ve eni bağımlı değişkenler için oluşturulan eşitlik (1) ve (2), yumurta boyu ve eninin tahmini için oldukça yüksek performansa sahip olduğu saptanmıştır. Her iki denklemle elde edilen R2 değeri 0.99 olup yumurta ağırlık değişkeninin bıldırcın yumurta boyu ve eni değişkenlerindeki toplam değişimi açıklama oranı %99 olarak bulunmuştur. Önerilen yumurta boyu regresyon denklemi ile Rahn and Paganelli (1988) denklemi arasında ortalama farkının testi istatistiksel olarak anlamlı bulunmamıştır (P=0,939).
Comparison between Linear and Non-linear ANN Models for Predicting Water Quality Parameters at Tigris River

In this research, Artificial Neural Networks (ANNs) technique was applied in an attempt to predict the water levels and some of the water quality parameters at Tigris River in Wasit Government for five different sites. These predictions are useful in the planning, management, evaluation of the water resources in the area. Spatial data along a river system or area at different locations in a catchment area usually have missing measurements, hence an accurate prediction. model to fill these missing values is essential.The selected sites for water quality data prediction were Sewera, Numania , Kut u/s, Kut d/s, Garaf observation sites. In these five sites models were built for prediction of the water level and water quality parameters. the following (Biological Oxygen Demand( ), Phosphate,( ) Sulfate(), Nitrate( ), Calcium(Ca), Magnesium(Mg), Total Hardness(TH), Potassium(K), Sodium (Na), Chloride (CL), Total Dissolved Solids (TDS), Electric conductivity (EC), Alkalinity(ALK)). The ANN models tried herein were the Multisite- Multivariate ANN models (5-sites, 14 variables), five models were built, one for each of the five stations as the missing data station. The linear ANN (traditional) models fail to make the prediction of all variables with high correlation coefficient simultaneously. Hence a non- linear input ANN model was developed herein and believed to be a new modification in ANN modeling. It was found that the ANNs have the ability to predict water level and water quality parameters at all the sites with a good degree of accuracy, the range of correlation coefficients obtained are (12.9%-97.2%) for linear models, while for this model with Non-linear terms, The range of correlation coefficients obtained is (71.8%-99.6%).
ANALISIS PRODUKTIVITAS PETANI SAYURAN DAUN DI DESA PASSO KECAMATAN BAGUALA KOTA AMBON

Produktivitas petani dalam menjalankan usahatani dipengaruhi oleh berbagai faktor, diantaranya dari faktor dalam petani (umur, pendidikan) maupun dari usahataninya (luas lahan, benih, pupuk, pestisida dan produk). Penelitian ini bertujuan untuk menganalisis faktor - faktor yang mempengaruhi produktivitas petani di Desa Passo, Kecamatan Baguala, Kota Ambon. Lokasi penelitian dipilih secara sengaja, di mana merupakan salah satu sentra produksi sayuran di Kota Ambon. Sampel penelitian dipilih secara sengaja yang berjumlah 45 orang dari 120 anggota kelompok tani di Desa Passo. Data dikumpulkan dalam penelitian ini berupa data primer (wawancara) dan data sekunder (literature dan instansi yang terkait masalah penelitian). Data yang telah dikumpulkan kemudian dianalisis dengan menggunaka uji regresi linear berganda dan dijelaskan secara deskriptif. Hasil penelitian menunjukkan bahwa secara parsial faktor – faktor yang mempengaruhi produktivitas petani sayuran di Desa Passo adalah umur, luas lahan dan pestisida.
What’s to Like? Facebook as a Tool for Survey Data Collection

In this article, we explore the use of Facebook targeted advertisements for the collection of survey data. We illustrate the potential of survey sampling and recruitment on Facebook through the example of building a large employee–employer linked data set as part of The Shift Project. We describe the workflow process of targeting, creating, and purchasing survey recruitment advertisements on Facebook. We address concerns about sample selectivity and apply poststratification weighting techniques to adjust for differences between our sample and that of “gold standard” data sources. We then compare univariate and multivariate relationships in the Shift data against the Current Population Survey and the National Longitudinal Survey of Youth 1997. Finally, we provide an example of the utility of the firm-level nature of the data by showing how firm-level gender composition is related to wages. We conclude by discussing some important remaining limitations of the Facebook approach, as well as highlighting some unique strengths of the Facebook targeted advertisement approach, including the ability for rapid data collection in response to research opportunities, rich and flexible sample targeting capabilities, and low cost, and we suggest broader applications of this technique.
Aspirin use and survival after diagnosis of colorectal cancer.

CONTEXT Aspirin reduces risk of colorectal neoplasia in randomized trials and inhibits tumor growth and metastases in animal models. However, the influence of aspirin on survival after diagnosis of colorectal cancer is unknown. OBJECTIVE To examine the association between aspirin use after colorectal cancer diagnosis on colorectal cancer-specific and overall survival. DESIGN, SETTING, AND PARTICIPANTS Prospective cohort study of 1279 men and women diagnosed with stage I, II, or III colorectal cancer. Participants were enrolled in 2 nationwide health professional cohorts in 1980 and 1986 prior to diagnosis and followed up through June 1, 2008. MAIN OUTCOME MEASURE Colorectal cancer-specific and overall mortality. RESULTS After a median follow-up of 11.8 years, there were 193 total deaths (35%) and 81 colorectal cancer-specific deaths (15%) among 549 participants who regularly used aspirin after colorectal cancer diagnosis, compared with 287 total deaths (39%) and 141 colorectal cancer-specific deaths (19%) among 730 participants who did not use aspirin. Compared with nonusers, participants who regularly used aspirin after diagnosis experienced a multivariate hazard ratio (HR) for colorectal cancer-specific mortality of 0.71 (95% confidence interval [CI], 0.53-0.95) and for overall mortality of 0.79 (95% CI, 0.65-0.97). Among 719 participants who did not use aspirin before diagnosis, aspirin use initiated after diagnosis was associated with a multivariate HR for colorectal cancer-specific mortality of 0.53 (95% CI, 0.33-0.86). Among 459 participants with colorectal cancers that were accessible for immunohistochemical assessment, the effect of aspirin differed significantly according to cyclooxygenase 2 (COX-2) expression (P for interaction = .04). Regular aspirin use after diagnosis was associated with a lower risk of colorectal cancer-specific mortality among participants in whom primary tumors overexpressed COX-2 (multivariate HR, 0.39; 95% CI, 0.20-0.76), whereas aspirin use was not associated with lower risk among those with primary tumors with weak or absent expression (multivariate HR, 1.22; 95% CI, 0.36-4.18). CONCLUSION Regular aspirin use after the diagnosis of colorectal cancer is associated with lower risk of colorectal cancer-specific and overall mortality, especially among individuals with tumors that overexpress COX-2.
How low can you go? Performance of factor analytic models in the analysis of multi-environment trials with small numbers of varieties

Crop breeding programs test large numbers of crop varieties in field trials spanning a range of years and locations, with these groups of trials known as multi-environment trials (MET). In the early stages of crop breeding programs large numbers of new varieties are grown in a small number of field trials. The best varieties in each stage are selected to progress to the next stage so that in the final stages a small number of elite varieties are grown in a large number of field trials across the country. These trials are conducted to determine which varieties perform best in which environments and an appropriate statistical analysis resulting in accurate predictions of the variety by environment (VxE) effects is integral to this. There have been many statistical approaches to the analysis of MET data, however all methods involve investigating the nature of the VxE effects. The factor analytic (FA) structure for the VxE effects allows heterogeneity of genetic variance for environments and heterogeneity of genetic covariance between pairs of environments, and is currently considered best practice in the analysis of MET data in Australia. The FA model has been shown to be the superior model for large numbers of varieties both in terms of goodness-of-fit and the selection of superior varieties. However, this superiority has not been demonstrated for small numbers of varieties, such as in the late stages of crop breeding programs, despite being regularly used in such scenarios. Five data sets with different underlying VxE patterns and numbers of trials, four numbers of varieties, and two levels of varietal concurrence were used to provide scenarios for a simulation study to investigate the adequacy of an FA variance structure for VxE effects. How the accuracy of the FA model changes as the number of crop varieties decrease, along with the implications the underlying VxE variance structure and level of varietal concurrence have on the accuracy of the FA model when dealing with small numbers of varieties were investigated. The comparisons were based on the mean square error of prediction of the VxE effects. This study showed that 15 varieties per trial is sufficient in a MET data set to accurately estimate the VxE effects, and that in some cases MET data sets with even as few as 10 varieties could be considered. It was found that the underlying patterns in the variance of the VxE effects impacted on how the accuracy of the FA model compared to the accuracy of other models, especially for very small numbers of varieties. In addition this study demonstrated that the FA model is affected by changes in concurrence more than the other models that were considered, however these changes in accuracy have minimal implications. Finally, this study highlighted the tendency of the log-likelihood ratio test to select overly complicated models in its test for a significant model improvement.
Experimental and numerical simulation of bidirectional propagation of an air cavity

This study numerically and experimentally investigates the transient flow associated with a so-called Benjamin bubble, but, in contrast to previous studies, the approach permits bidirectional flow. Two experiments investigated the bidirectional propagation of an air cavity in a square tank; these two events were also simulated using a three-dimensional numerical model. An exactly conservative semi-Lagrangian scheme was employed to solve both the advection term in the momentum equation and the advection equation of the volume of fluid function. The model was compared with previous one-dimensional Benjamin bubble experimental data and a one-dimensional Boussinesq model. For the one-dimensional Benjamin bubble experiments, the three-dimensional model showed good agreement with both published data and a one-dimensional non-hydrostatic model. After modelling the advance of a one-dimensional cavity, a bidirectional Benjamin bubble was simulated using the three-dimensional model. The numerical results are in reasonable agreement with observations of the free surface and pressurized regions and reasonably predict the shape of the air–water interface.
EFFECT OF ROW SPACING, MINERAL AND ORGANIC FERTILIZERS ON YIELD AND GROWTH PARAMETERS OF PANICUM MAXIMUM ON FERRALITIC SOIL IN BENIN (WEST AFRICA).

This study proposes to evaluate the influence of the spacing row and NPK 15-15-15 fertilizer and goat manure on Panicum maximum seed production and fodder nutritive value harvested in south Benin on ferralitic soil from 2015 to 2017. The experiment was a factorial design comprising all combinations of 4 row spacings (20, 40, 60 and 80 cm) and 6 fertilizers: six levels of fertilizer: (F0) No goat manure (Control) (F1), 100 kg NPK 15-15-15, (F2) 20 t/ha goat manure, (F3) 15 t/ha goat manure, (F4) 10t/ha goat manure + 33kg NPK 15-15-15 and (F5) 5 tons + 66 Kg NPK/ha. Four replications were used in the experiment. The results showed that wider row spacing (60 cm) enhanced seed production in this experiment. Number of total tillers/tussock, fertile tillers/tussocks and spike length were significantly greater under the widest rows spacing (60 cm and 80 cm). The best seed yield got with row spacing 60 cm (392.1 kg.ha -1 ) and 45.5% of caryopses germinate after six months of storage against 14.5% for spikelet. Seed yield and its attributes increased significantly with NPK combined to goat manures (F4).
Auto-organisation d’ondes optiques incohérentes : Condensation, thermalisation et repolarisation

Le sujet de cette these porte sur les phenomenes d’auto-organisations d’ondes optiques non-lineaires. Ce travail principalement theorique et numerique repose sur differents formalismes de turbulenced’ondes, les singularites Hamiltoniennes et diverses experiences.Une premiere partie de la these porte sur les processus irreversibles de thermalisation et de conden-sation d’ondes. Le phenomene de condensation se caracterise par la formation d’une structure coherentea grande echelle (condensat) qui reste immergee dans une mer de fluctuations aux petites echelles (parti-cules non condensees). En depit des longueurs de propagation redhibitoires pour atteindre l’etat d’equilibrecondense, nous avons mis en evidence experimentalement et theoriquement un phenomene de pre-condensation qui a lieu loin de l’equilibre etqui joue un role precurseur pour l’etat d’equilibre asymptotique. Par ailleurs, sur la base d’observations ex-perimentales recentes du phenomene de nettoyage de faisceau dans une fibre optique multimode, nousavons developpe une approche cinetique de turbulence d’ondes prenant en compte le desordre structu-rel du materiau. La theorie revele que le desordre entraine une acceleration significative du processus decondensation permettant d’expliquer l’effet de nettoyage de faisceau. Les experiences effectuees reportentl’observation d’une transition de la distribution thermique vers la condensation, avec une fraction macro-scopique de puissance condensee dans le mode fondamental. Nous avons aussi etudie l’impact d’une re-ponse fortement non-locale (ou non-instantanee) sur la propagation d’un speckle, ce qui a permis d’iden-tifier un mecanisme d’emergence spontanee de coherence de phase a longue portee.Une seconde partie des travaux est centree sur le phenomene d’attraction de polarisation lors de l’in-jection d’ondes incoherentes aux deux extremites d’une fibre optique. La dynamique spatio-temporelle desondes partiellement polarisees contra-propagatives relaxe vers un etat stationnaire ou se produit un phe-nomene d’auto-polarisation survenant au point milieu de la fibre. Ce phenomene est lie a la presence desingularites dans le systeme Hamiltonien associe a l’etat stationnaire.
Synthetic boundary condition for compressible near wall turbulence

Direct Numerical Simulation of turbulent boundary layers requires a high spatial resolution specially near the wall to capture the different length scales inherent of turbulence. To reduce the computing cost related to the high spatial resolution, we investigate techniques that bypass the wall region by using an artificial boundary condition at the bound of a reduced computational domain. A reconstruction strategy based on POD is implemented in order to generate synthetic boundary conditions such that the correct spatial characteristics and dynamics of the turbulence are recovered in the core region of the channel. The boundary condition was tested at two different heights. Statistics in the reduced channel were compared with those of a reference case. A good agreement is observed for the mean velocity profile and the turbulent shear stress. The procedure was found to be robust with the boundary height and results in a drastic computational cost reduction.
Sunspot Characteristics at the Onset of the Maunder Minimum Based on the Observations of Hevelius

An analysis of the sunspot observations made by Hevelius during 1642–1645 is presented. These records are the only systematic sunspot observations just before the Maunder Minimum (MM). We have studied different phenomena meticulously recorded by Hevelius after translating the original Latin texts. We reevaluate the observations of sunspot groups by Hevelius during this period and obtain an average value 7% greater than that calculated from his observations given in the current group database. Furthermore, the average of the active day fraction obtained in this work from Hevelius’s records previous to the MM is significantly greater than the solar activity level obtained from Hevelius’s sunspot observations made during the MM (70% versus 30%). We also present the butterfly diagram obtained from the sunspot positions recorded by Hevelius for the period 1642–1645. It can be seen that no hemispheric asymmetry exists during this interval, in contrast with the MM. Hevelius noted a ∼3-month period that appeared to lack sunspots in early 1645 that gave the first hint of the impending MM. Recent studies claim that the MM was not a grand minimum period, speculating that astronomers of that time, due to the Aristotelian ideas, did not record all sunspots that they observed, producing thus an underestimation of the solar activity level. However, we show that the good quality of the sunspot records made by Hevelius indicates that his reports of sunspots were true to the observations.
The Effects of Geriatric Nursing Education for Nursing Students' Attitude, Perception toward Dementia and Dementia Policy

This study was a nonequivalent pretest-posttest quasi-experimental study. It was conducted to evaluate the effects of a nursing geriatric nursing education for nursing students' attitude, perception and dementia policy. Subjects were 172 persons, sophomore of nursing college in the city of K and city of J, and the education group was taken 56 houres of gerontological nursing education. Data were analyzed by mean, percentage, t-test and x² using SPSS Win 20.0. As the result, in the education group, the knowledge of dementia was higher on average 27.10, and there was a significant statistic differance(t=7.500, p<000). In the atitude of demencia, the average of education group was higher on 4.10, and the atitude about dementia in the education group was more positive and here was a significant statistic difference(t=1.423, p<000). In the understanding of dementia policy, there was more positively improvement However, there was no significant statistic difference (t=1.70, p=.090). Through this result, we could reccognize that gerontological nursing education was effective for nursing students to improve knowledge about dotards, change atitude positively. Therefore we tried this study for provide basic data to develop gerontological nursing education progress combining theory with practice.
On the ergodicity of a class of level-dependent quasi-birth-and-death processes

Abstract We examine necessary and sufficient conditions for recurrence and positive recurrence of a class of irreducible, level-dependent quasi-birth-and-death (LDQBD) processes with a block tridiagonal structure that exhibits asymptotic convergence in the rows as the level tends to infinity. These conditions are obtained by exploiting a multi-dimensional Lyapunov drift approach, along with the theory of generalized Markov group inverses. Additionally, we highlight analogies to well-known average drift results for level-independent quasi-birth-and-death (QBD) processes.
The Total Solar Eclipse of 2017: Meteorological Observations from a Statewide Mesonet and Atmospheric Profiling Systems

A total solar eclipse traversed the continental United States on 21 August 2017. It was the first such event in 99 years and provided a rare opportunity to observe the atmospheric response from a variety of instrumented observational platforms. This paper discusses the high-quality observations collected by the Kentucky Mesonet (www.kymesonet.org), a research-grade meteorological and climatological observation network consisting of 72 stations and measuring air temperature, precipitation, relative humidity, solar radiation, wind speed, and wind direction. The network samples the atmosphere, for most variables, every 3 s and then calculates and records observations every 5 min. During the total solar eclipse, these observations were complemented by observations collected from three atmospheric profiling systems positioned in the path of the eclipse and operated by the University of Alabama in Huntsville (UAH). Observational data demonstrate that solar radiation at the surface dropped from >800 to 0 W m‒2, the air temperature decreased by about 4.5°C, and, most interestingly, a land-breeze–sea-breeze-type wind developed. In addition, due to the high density of observations, the network recorded a detailed representation of the spatial variation of surface meteorology. The UAH profiling system captured collapse and reformation of the planetary boundary layer and related changes during the total solar eclipse.
A new Singular Trudinger–Moser Type Inequality with Logarithmic Weights and Applications

Abstract In this paper, we establish a new singular Trudinger–Moser type inequality for radial Sobolev spaces with logarithmic weights. The existence of nontrivial solutions is proved for an elliptic equation defined in ℝn{\mathbb{R}^{n}}, relying on variational methods and involving a nonlinearity with doubly exponential growth at infinity.