Miracle-dz/UniFAR-FTUs huggingface dataset:
The application of e-commerce recommendation system in smart cities based on big data and cloud computing

In the era of big data, the amount of Internet data is growing explosively. How to quickly obtain valuable information from massive data has become a challenging task. To effectively solve the problems faced by recommendation technology, such as data sparsity, scalability, and real-time recommendation, a personalized recommendation algorithm for e-commerce based on Hadoop is designed aiming at the problems in collaborative filtering recommendation algorithm. Hadoop cloud computing platform has powerful computing and storage capabilities, which are used to improve the collaborative filtering recommendation algorithm based on project, and establish a comprehensive evaluation system. The effectiveness of the proposed personalized recommendation algorithm is further verified through the analysis and comparison with some traditional collaborative filtering algorithms. The experimental results show that the e-commerce system based on cloud computing technology effectively improves the support of various recommendation algorithms in the system environment; the algorithm has good scalability and recommendation efficiency in the distributed cluster, and the recommendation accuracy is also improved, which can improve the sparsity, scalability and real-time problems in e-commerce personalized recommendation. This study greatly improves the recommendation performance of e-commerce, effectively solves the shortcomings of the current recommendation algorithm, and further promotes the personalized development of e-commerce.
Cooperative Fault-Tolerant Control for Networks of Stochastic Nonlinear Systems With Nondifferential Saturation Nonlinearity

This article addresses the cooperative fault-tolerant control problem for networks of stochastic nonlinear systems with actuator faults and input saturation. The fuzzy neural networks (FNNs) are employed to estimate the unknown functions and stochastic disturbance terms. To analyze the nondifferential saturation nonlinearity, a smooth nonlinear function of the control input signal is constructed to estimate the saturation function. A novel adaptive fault-tolerant control protocol is proposed by using backstepping design technique. By using the stochastic Lyapunov functional strategy, it is proved that all the followers’ outputs eventually converge to a small neighborhood of the leader’s output, and all the signals in the closed-loop systems are bounded in probability. Finally, the performance of the proposed control strategy is illustrated through simulation.
An Integrated Experimental and Computational Approach for the Investigation of Irradiation Effects in Materials

Ion beams delivered by particle accelerators are routinely used to emulate harsh, radiative environments and they also constitute the foundations of the modern microelectronics industry. To characterize irradiated materials, numerous experimental and computational techniques can be implemented, but it is extremely diffcult to effectively intertwine them, and to compare the associated data. In the present work, we present an integrated, experimental and computational approach that uses a same set of molecular dynamics simulations to generate signals of Rutherford backscattering spectrometry in channelling condition andX-ray diffraction, with UO2 as a test-case material. From these signals, parameters to monitor the damage level are computed, compared and confronted with experimental data. The good agreement that comes out demonstrates the validity of the approach, hence providing a new tool for the fine study of irradiation effects in materials.
Over-the-Air Array Calibration of mmWave Phased Array in Beam-Steering Mode Based on Measured Complex Signals

Accurate knowledge of initial complex excitation coefficients for phased-array elements is essential to ensure accurate array performance. In the literature, many array calibration algorithms have been proposed for this purpose, which generally requires customized phase setting for individual phase shifters connected to array elements. In this article, a new array calibration method is proposed for phased array operating in beam-steering mode only, that is, phase shifts of elements are only simultaneously set according to the beam-steering directions, and therefore, there is no need for dedicated individual element phase tuning. The proposed method requires a minimum number of complex-signal measurements in principle, which enables fast measurement. Furthermore, it is found that the performance of the proposed method is determined by the beam-steering matrix, whose condition number is mainly ruled by the beam-steering angle interval. The proposed method is numerically simulated and experimentally validated in a millimeter-wave (mmWave) phased-array antenna-in-package (AiP) platform at 28 GHz. The proposed method presents good agreement with the well-known rotating element electric field vector (REV) array calibration method, with an amplitude error and phase error within ±0.5 dB and ±5°, respectively. Furthermore, the reconstructed array pattern with the proposed method offers excellent match with the measured array pattern.
Effect of Temperature on the EPR Properties of Oil Shale Pyrolysates

The reaction involving radical species is a key factor during the pyrolysis process used to form hydrocarbons. In this study, electron paramagnetic resonance (EPR) spectroscopy was used to characterize the properties of free radicals in the pyrolysates of oil shale. Effects of temperature on the yields and the EPR properties of thermal bitumen, shale oil, and semicoke were investigated, with the aim to understand the behavior of free radicals during the oil shale pyrolysis process. This study shows that the free radical concentrations (Ng) of shale oil and semicoke become higher with increasing temperature. The yield and Ng of thermal bitumen as an intermediate product follow the similar trends in the whole temperature range, first increasing and then decreasing. This is attributed to the competing mechnism of thermal bitumen generation and decomposition. The Ng of shale oil is lower than those of semicoke and thermal bitumen due to the coupling reaction of free radicals before the volatiles being condens.
Amount and types of sugars in selected commercial and traditional kuih in Klang Valley, Malaysia

The aim of this study was to determine the specific content and type of sugars in selected commercial and traditional kuih in Klang Valley. The selection of the kuih was based on the validated Food Frequency Questionnaire (FFQ) for sugar. The selected commercial kuih was doughnut coated with sugar (Big Apple) while the ten traditional kuih samples consisted of kuih bingka ubi, kuih kasui, kuih keria, kuih koci, kuih lapis, kuih lopes, kuih onde-onde, kuih sagu, kuih seri muka and kuih talam. The doughnut coated with sugar (Big Apple) was purchased from Big Apple Donuts and Coffee franchise at two different locations, while the traditional kuih were randomly bought from stalls, cafeterias and restaurants around Kuala Lumpur and Rawang. The types and amount of sugar were determined using High-Performance High Chromatography (HPLC) with a refractive index (RI) detector. Results showed that doughnut coated with sugar (Big Apple) has the highest starch content (22.6±0.3 g/100g) and kuih keria contained the highest available carbohydrate (41.5±1.7 g/100g), comprising of 24.2±2.4 g/100g total sugar and 17.3±0.7 g/100g of starch. The least available carbohydrate content was found in kuih talam (20.0±0.5 g/100g), which was 50% lower than the one in kuih keria. Major individual sugars detected in all kuih samples were consisted of sucrose (60.0%), glucose (16.2%), fructose (14.0%), maltose (9.5%) and lactose (0.3%). Majority of the kuih samples (90.9%) in this study can be categorized as medium sugar while only kuih keria was categorized as high sugar. Based on the two main ingredients (sugar and flour) used in the preparation of kuih, results showed that all kuih samples can be categorized as medium sugarmedium starch. In conclusion, this study served as a guideline by locals in selecting kuih of different sugar levels.
Genetic Structure in 21 Remnant Phoebe Sheareri Populations in Southern China: Implications for Genetic Resource Conservation

Background: Phoebe sheareri (Lauraceae) is a valuable and endemic tree species in China, with limited large natural communities remnant. Genetic diversity and differentiation analysis are essential to manage their conservation and utilization. To provide a conservation and utilization strategy of P. sheareri based on sound genetic diversity and differentiation data.Results: We found medium level of genetic diversity and low inbreeding. Nei's gene diversity and Shannon’s information index value showed medium genetic diversity in nature populations of P. sheareri, which was higher than other two Phoebe species. AMOVA showed the genetic differentiation among populations was significantly, and 21.2% of genetic variation was among populations. Bayesian clustering, obtained with STRUCTURE, grouped the populations into four genetic clusters, whereas UPGMA analysis distinguished three main groups approximately in line with the geographic area of occurrence.Conclusion: Based on the study results, the establishment of gene conservation units must be considered in nature conserves in order to protect the genetic diversity of the species, and the proposal of sampling strategies for ex situ conservation and reforestation.
Qualitative Profile and Quantitative Determination of Flavonoids from Crocus Sativus L. Petals by LC-MS/MS

From the methanolic extract of Crocus sativus petals nine known flavonoids have been isolated and identified, including glycosidic derivatives of quercetin and kaempferol as major compounds (1–2), and their methoxylated and acetylated derivatives. Additionally, LC-ESI-MS qualitative and LC-ESI-MS/MS quantitative studies of the major compounds of the methanolic extract were performed. The high content of glycosylated flavonoids could give value to C. sativus petals, which are a waste product in the production of the spice saffron.
Decentralized Control of Switched Systems With Receding Horizon Modal Information and Path-Dependent Performance Specifications: Theory and an Application

In this article, we develop synthesis methods for decentralized control of switched systems with mode-dependent (more generally, path-dependent) performance specifications and apply them to an experimental vehicular testbed. This specification flexibility is important when achievable system performance varies greatly between modes, as a mode-independent specification will lead to designs that do not extract all the system performance available in each mode. More specifically, under these specifications, we derive exact conditions for the existence of block lower triangular path-dependent controllers with $\ell _{2}$ -induced-norm performance. The synthesis conditions are given in the form of a semidefinite program (SDP) for both uniform and path-dependent performance bounds. Building on previous results, we also introduce a basis-based approach that allows computational complexity to be more carefully controlled. We apply the resulting design methods to a group of miniature quadcopters, illustrating different features of the presented methods, along with some practical engineering considerations.
Alterations in the root proteomes of Brassica napus cultivars under salt stress

Soil salinization is an important environmental problem affecting agricultural production worldwide. Seed germination is a critical process, and seedling establishment under saline conditions can be achieved by successful germination. In the present study, comparative proteomics combined with physiological analyses were used to investigate the protein alterations in germinating Brassica napus cultivars (Caravel and Sary) under NaCl stress. Seed germination declined with the increasing NaCl concentration. However, Caravel exhibited better performance in terms of seed germination and seedling growth under salinity stress. Therefore, Caravel was found to be more tolerant to salinity than Sary. The root proteins were extracted from B. napus cultivars germinating on a plant growth medium with or without 100 mM NaCl for seven days. After the root proteins had been separated by two-dimensional (2-D) gel electrophoresis, the differentially accumulated proteins were identified using MALDI-TOF/TOF MS. The comparative proteomics analysis revealed 12 and 27 statistically significant proteins accumulated in the NaCl-treated roots of Caravel and Sary, respectively. The identified proteins were mostly involved in protein metabolism, stress defense, cytoskeleton and cell wall metabolism, and energy metabolism. The salt-sensitive cultivar Sary displayed an elevated accumulation of proteins involved in antioxidant defense and the protein catabolic process such as superoxide dismutase [Fe], L-ascorbate peroxidase 1, and different components of the proteasome system. On the other hand, the levels of molecular chaperones including 20 kDa chaperonin, chaperonin CPN60, heat shock cognate protein HSC70, and heat shock 70 kDa protein 1 were higher in Caravel than Sary under salt stress. These findings will provide the possible mechanisms which contribute to salt tolerance and may serve as the basis for improving salinity tolerance in rapeseed.
Microbial Deterioration of Portuguese Lamb Meat as Affected by Its Intrinsic Properties

In Portugal, the main autochthonous sheep breeds exploited for meat production are Churra Galega Bragançana (CGB) and Bordaleira de Entre Douro e Minho (BEDM). This study aimed to characterise the evolution of spoilage microorganisms in refrigerated vacuum-packed (VP) lamb meat from BEDM and CGB breeds and to elucidate how the intrinsic properties of meat can affect its microbial spoilage. Meat from the BEDM breed presented higher (p < 0.0001) populations of mesophiles, lactic acid bacteria, Pseudomonas spp. and psychrotrophic bacteria, since its higher ultimate pH (means: 5.77 for BEDM vs. 5.58 for CGB) accelerated spoilage rate (p < 0.0001). While water activity and protein content were not found to regulate microbial deterioration (p > 0.05), the growth of spoilage bacteria was exacerbated by higher moisture (p < 0.0001) and higher ash content (p < 0.001). On the contrary, a higher intramuscular fat content slowed down (p < 0.0001) the growth of spoilage bacteria in VP lamb meat.
Understanding Motivations and Segmentation in Ecotourism Destinations. Application to Natural Parks in Spanish Mediterranean Area

Ecotourism is one of the tourism variants with more annual growth. Motivation has become a fundamental criterion for travel behavior. Segmentation is used to identify the market niches of different tourism products and services. This study collects these three elements and is designed to examine demand segmentation and motivations in ecotourism. The analysis was carried out in the Albufera and Serranía de Cuenca Natural Parks, both located in the Mediterranean area in Spain. The analysis sample consists in 349 surveys obtained in situ. For the data analysis, a factor analysis and nonhierarchical K-media segmentation were performed. The results show eight motivational dimensions: “Interpersonal relationships”, “Self-development”, “Escape”, “Building personal relationships”, “Nature”, “Ego-defensive function”, “Rewards”, and “Fun”. According to tourists’ motivations, three ecotourist segments are obtained: “Nature”, “Multiple motives”, and “Reward and Escape”. This research can assist companies and institutions to improve tourism service offers and perform efficient marketing planning.
Maternal serum lipids in some women with pre-eclampsia in Yaoundé

Preeclampsia is one of the most common complications of pregnancy and occurs in approximately 3-8% of all pregnancies worldwide. Although the aetiology of preeclampsia still largely remains unclear, it is thought to be related to endothelial dysfunction and can lead to serum lipid abnormalities. Therefore, this case-control study was conceived and designed with the aim to compare maternal lipid profile parameters and cardiovascular risk factors, between preeclamptic and healthy pregnancies. Blood samples were collected after overnight fasting from 48 preeclamptics and 96 healthy pregnant controls matched for age and gestational weeks and serum lipid profile concentrations were estimated and used them to calculate cardiac risk ratio I and II. There was a significant rise in serum lipid levels in pregnancies complicated by preeclampsia. These lipids turn out to be risk factor for cardiovascular diseases. Positive correlation of maternal serum lipids to high blood pressure suggests a causal relationship.
Bedside Temporary Transvenous Pacemaker Insertion in the Emergency Department: A Single-Center Experience

Objectives: Insertion of a temporary transvenous pacemaker (TTPM) is one of the life-saving interventions performed in the emergency department (ED). The aim of the study was to determine demographic, clinical characteristics, and in-hospital outcomes of patients who underwent TTPM insertion due to hemodynamically unstable bradyarrhythmia in the ED. Methods: In our study, 234 consecutive patients who underwent TTPM insertion at the bedside in the ED between January 2014 and October 2019 were included in the study. Etiological characteristics, electrocardiographic (ECG) findings, requirements for permanent pacemaker (PPM), and in-hospital mortality of the patients were analyzed retrospectively. Results: Extrinsic causes were the most common etiology of unstable bradyarrhythmia (57.6%). Most extrinsic causes were drug therapy-related factors (60.7%). Bradyarrhythmia persisted in 60% of patients after extrinsic causes were eliminated. The most common ECG finding was a high-degree atrioventricular block (62%). PPM was implanted in 44% of patients. In-hospital mortality rate was 19.7%. In the multivariate regression analysis, the left ventricular ejection fraction (LVEF) and diastolic blood pressure (DBP) measured at admission (p<0.001 and p<0.001, respectively) were determined to be independent predictors for in-hospital mortality. Conclusion: First diagnosis and intervention in the ED are of great importance for patients with unstable bradyarrhythmia. The fastest possible TTPM insertion in the ED can reduce mortality by reducing the exposure time to hypoperfusion of vital organs, especially in patients with reduced LVEF and low DBP. Furthermore, it should be kept in mind that an underlying latent conduction system disease can also be present in bradyarrhythmias thought to occur potentially due to extrinsic factors.
Threshold changeable secret image sharing using bivariate polynomial

In secret image sharing (SIS) scheme, a confidential image is encrypted into multiple shadows, any group of shadows that reaches the threshold, otherwise nothing can be reconstructed at all. Most existing SIS schemes have a fixed threshold, however in this work, we consider more complicated cases that the threshold may be adjusted due to the changeable security environment. In this paper, we construct a $(k\leftrightarrow h,n)$ threshold changeable SIS (TCSIS) scheme using bivariate polynomial, which has $h-k+1$ possible thresholds $k,k+1,. ,h$. During image reconstruction, each participant can update the his shadow according to the current threshold $T$ only based on his initial shadow. Comparing with previous TCSIS schemes, the proposed scheme achieves unconditional security, and can overcome the information disclosure problem caused by homomorphism.
HIV/AIDS Current Treatment in Nanotechnology

AIDS (Acquired Immunodeficiency Syndrome) is a chronic and life-threatening condition which is caused by the virus HIV (Human Immunodeficiency Virus). This virus damages the individual immune system; HIV interferes with individual’s body ability to fight with the infection and disease. HIV is STI (Sexually Transmitted Infection) and it also spreads by contact with the infected blood, from mother to child during pregnancy, childbirth or breast-feeding. Without medication, it will take few years before HIV weakens the individual immune system to the point that individual may have AIDS [1]. At present there is no cure no medicine and no preventive vaccine for HIV/AIDS. Combination antiretroviral therapy has improved treatment, but it should be taken for lifetime, and has several side effects and ineffective in individuals in whom the virus develops its resistance. The finest way to fight against global infections is through preventive strategies, vaccines being as the most effective agents. Vaccines are very effective in controlling the major infectious diseases like polio, mumps, measles; rubella and smallpox are completely eradicated.
Dämpfung der Schaltoszillationen von SiC-Hochstrom-MOSFET

In dieser Arbeit wird ein neuer Ansatz zur Dampfung der parasitaren Schwingungen an SiC-Hochstrom-MOSFETs vorgestellt. Der Dampfungswiderstand wird dabei induktiv eingekoppelt. Dazu wird statt einem Dampfungsglied mit Sekundarwicklung ein Dampfungsglied bestehend nur aus einem Eisenpulverkern verwendet. Der Kern wird so gewahlt, dass die Verluste bei Frequenz der Schaltschwingungen maximal sind. An einem 1200V-Modul wurde die Funktion dieses Ansatzes bei 200 A Laststrom nachgewiesen. Dieser einfache und gunstige Ansatz erreicht eine gute Dampfung bei moderater zusatzlicher Uberspannung.
Fake news and deepfakes: A dangerous threat for 21st century information security

: Fake news, often referred to as junk news or pseudo-news, is a form of yellow journalism or propaganda created with the purpose of distributing deliberate disinformation or false news using traditional print or online social media. Fake news has become a significant problem globally in the past few years. It has become common to find popular individuals and even members of the state using misinformation to influence individuals’ actions whether consciously or sub-consciously. The latest trend is using Artificial Intelligence (AI) to create fake videos known as “ deepfakes ” . Deepfake, a portmanteau of “deep learning” and “fake”, is an artificial intelligence -based human image synthesis technique. It is used to combine and superimpose existing images and videos onto source images or videos using a machine learning technique cal led a “generative adversarial network” (GAN). The combination of the existing and source videos results in a fake video that shows a person or persons performing an action at an event that never occurred in reality. This paper provides an overview of the currently available creation and detection techniques to identify fake news and deepfakes. The outcome of this paper provides the reader with an adequate literature review that summarises the current state of fake news and deepfakes, with special attention given to the tools and technologies that can be used to both create and detect fake news or deepfake material.