Miracle-dz/UniFAR-FTUs huggingface dataset:
A Hybrid User Mobility Prediction Approach for Handover Management in Mobile Networks

Mobile networks are expected to face major problems such as low network capacity, high latency, and limited resources but are expected to provide seamless connectivity in the foreseeable future. It is crucial to deliver an adequate level of performance for network services and to ensure an acceptable quality of services for mobile users. Intelligent mobility management is a promising solution to deal with the aforementioned issues. In this context, modeling user mobility behaviour is of great importance in order to extract valuable information about user behaviours and to meet their demands. In this paper, we propose a hybrid user mobility prediction approach for handover management in mobile networks. First, we extract user mobility patterns using a mobility model based on statistical models and deep learning algorithms. We deploy a vector autoregression (VAR) model and a gated recurrent unit (GRU) to predict the future trajectory of a user. We then reduce the number of unnecessary handover signaling messages and optimize the handover procedure using the obtained prediction results. We deploy mobility data generated from real users to conduct our experiments. The simulation results show that the proposed VAR-GRU mobility model has the lowest prediction error in comparison with existing methods. Moreover, we investigate the handover processing and transmission costs for predictive and non-predictive scenarios. It is shown that the handover-related costs effectively decrease when we obtain a prediction in the network. For vertical handover, processing cost and transmission cost improve, respectively, by 57.14% and 28.01%.
Padrões espaciais da mobilidade de trabalhadores qualificados nas regiões brasileiras

A mobilidade de trabalhadores qualificados representa uma das mais importantes formas de geração de transbordamentos locais de conhecimento, uma vez que trabalhadores qualificados possuem a capacidade de incrementar a geração e a difusão de novos conhecimentos nas regiões. Nessa linha, o objetivo deste artigo é apresentar os padrões de mobilidade espacial dos trabalhadores qualificados nas regiões brasileiras. A partir dos microdados da RAIS no período 2009-2014 foi possível mapear a mobilidade desses trabalhadores entre microrregiões em todo o país. Os resultados contribuem para o debate sobre os padrões de movimentação de trabalhadores qualificados, com efeitos importantes sobre o desenvolvimento regional. Os resultados apontam que a Região Metropolitana de São Paulo, algumas capitais de estados e cidades médias brasileiras foram as regiões que mais receberam trabalhadores qualificados, com destaque para regiões que são mais diversificadas e possuem maior número de atividades tecnológicas. Adicionalmente, observou-se que os trabalhadores qualificados se movem percentualmente mais do que os totais.
Estimating and Monitoring the Land Surface Temperature (LST) Using Landsat OLI 8 TIRS

Land Surface Temperature (LST) is average temperature of an element of the exact surface of the Earth calculated from measured radiance which depends on the albedo, the vegetation cover, and the soil moisture. Land Surface Temperature can affect human discomfort, health problem, higher energy bill and further reduce the habitability of urban and sub urban area as Makassar city has been recently undergoing massive urban development. This study tries to monitor and estimate Land Surface Temperature by using Landsat 8 TIRS and the data analyzed by vegetation index, and temperature index in order to derive Land Surface Temperature value. The result shows that the vegetation area declined around 3470 hectares in the last four years while the urban area increased approximately 1509 hectare. In addition, 2015, Makassar, South Sulawesi, Indonesia are experienced the highest temperature at 32 degree Celsius while 2019 shown that the maximum heat reached 29 degree celsius. However, the moderate and high temperature (26 – 29 degree Celsius) in 2019 expand and cover wider area than in 2015 as the area of vegetation declined and built-up area increased significantly
Bottom water oxygenation changes in the Southwestern Indian Ocean as an indicator for enhanced respired carbon storage since the last glacial inception

Abstract. We present downcore records of redox-sensitive authigenic uranium (U) and manganese (Mn) concentrations based on five marine sediment cores spanning a meridional transect encompassing the Subantarctic and the Antarctic zones in the Southwest Indian Ocean covering the last glacial cycle. These records signal lower bottom water oxygenation during glacial climate intervals and generally higher oxygenation during warm periods, consistent with climate-related changes in deep ocean remineralised carbon storage. Regional changes in the export of siliceous phytoplankton to the deep-sea may have entailed a secondary influence on oxygen levels at the water-sediment interface, especially in the Subantarctic Zone. The rapid reoxygenation during the deglaciation is in line with increased ventilation and enhanced upwelling after the Last Glacial Maximum (LGM), which, in combination, conspired to transfer previously sequestered remineralised carbon to the surface ocean and the atmosphere, contributing to propel the Earth’s climate out of the last ice age. These records highlight the yet insufficiently documented role the southern Indian Ocean played in the air-sea partitioning of CO2 on glacial-interglacial timescales.
Development of Web-Based GIS Alert System for Informing Environmental Risk of Dengue Infections in Major Cities of Pakistan

Dengue is one of the emerging major public health problems, and its incidence varies with climate conditions. It affects millions of people's lives owing to unusual socioeconomic conditions and epidemiological factors. This study was designed to build a web-based GIS alert system for dengue data management and analysis which would centralize information and make it accessible to all relevant stakeholders before, during, and after crises. Three geographical regions were selected in this study. The user interface of the dengue alert system was developed based upon MapGuide. Results indicate that risk level was mainly associated with Breteau Index. Karachi and Lahore were at their highest risk, i.e., level 4. Islamabad and Chakwal were also at the highest risk, i.e., level 4. Attock had high risk, i.e., level 3 followed by Haripur with minimal level 1. The high Breteau Index showed a direct relationship to high potential transmission of dengue outbreaks, a more significant peak of dengue was the result of monsoons, while smaller peaks were observed due to domestic water storage. Hence, it was concluded that monsoon is the best suitable season for the development of dengue. Web-Based GIS Alert System for dengue data management and analysis was developed, centralizing information and making it accessible to all relevant stakeholders before, during & after a crisis. This program creation will provide a more analytical forum for advising multiple levels of risk and an experimental method for measuring the effect of different factors on risk level distribution by adjusting the component's weighting. Keywords : Dengue; GIS analysis; GUI; Alert system; Breteau index; Weighted overlay Copyright (c) 2021 Geosfera Indonesia and Department of Geography Education, University of Jember This work is licensed under a Creative Commons Attribution-Share A like 4.0 International License
Work Engagement During Pandemic: Is Organizational Trust Still Relevant?

Hyder Ali Khawaja and Mustajab Ahmed Soomro, “Work Engagement During Pandemic: Is Organizational Trust Still Relevant? ”, Annals of Contemporary Developments in Management & HR (ACDMHR), Print ISSN: 2632-7686, Online ISSN: 2632-7694, pp. 1-10, Vol. 3, No. 2, 1st May 2021, Published by International Association of Educators and Researchers (IAER), DOI: 10.33166/ACDMHR.2021. 02.001, Available: http://acdmhr.theiaer. org/archive/v3/v3n2/p1.html. Research Article
Secure Cloud Medical Data Using Optimized Homomorphic Encryption

Protection of medical images on the virtual transmission platform is a simple and demanding activity, using multiple techniques to protect the digital file, such as cryptography, steganography and watermarking. This are the digital image protection approaches to meet security goals, i.e. confidentiality, trustworthiness, and usability. In this paper, the medical images are deposited in the cloud utilizing optimized homomorphic encryption. To increase the security level Rider Optimization Algorithm (ROA) is utilized to select the optimal key. Homomorphic encryption is a method of authentication which helps one to perform observes of the encrypted information through decrypting it. When the data is decrypted, the calculation consequence is stable, the same as if the procedures were conducted on the unprotected data. After completing the encrypted data, the encrypted images can be stored in the cloud and the decryption the same process is utilized to reconstruct the original images. For the experimental analysis, the performance of the proposed method is analyzed by the various parameters such as execution time, encryption time, and decryption time. The execution time of the proposed method is 2% decrease the HE existing method and 4% reduce the ECC algorithm.
Aptidão Agroclimática para a Cultura do Algodão em Três Municípios do Estado de Mato Grosso, Brasil

Resumo Os elementos climaticos como temperatura do ar e precipitacao exercem influencia direta sobre as culturas agricolas, principalmente no algodoeiro, determinando e influenciando sua adaptacao a diferentes regioes. O objetivo deste trabalho foi determinar a adaptabilidade agroclimatica e a probabilidade de chuvas para a cultura do algodao para os municipios de Rondonopolis, Tangara da Serra e Campo Novo do Parecis, estado de Mato Grosso. Utilizaram-se dados diarios historicos de precipitacao e temperatura do ar, disponibilizados pelo Instituto Nacional de Meteorologia (INMET). Com base nas exigencias climaticas da cultura do algodoeiro foi classificada a adaptabilidade nas regioes durante o ano em periodo decendial. Foi calculada a probabilidade empirica e a classificacao dos riscos de ocorrerem chuvas menores ou iguais a ETc durante o ciclo da cultura. A temperatura do ar media registrada nos municipios esteve entre a faixa indicada para a cultura (≥ 18 a ≤ 30 °C). Os municipios estudados podem ser considerados aptos ao cultivo do algodao no periodo safrinha (semeadura realizada de dezembro a fevereiro), considerando a temperatura e precipitacao pluviometrica media local. Os riscos de ocorrerem precipitacoes menores ou iguais a ETc do algodoeiro, variaram de acordo com o estadio fenologico da cultura.
Interaction-induced topological Bogoliubov excitations in a spin-orbit-coupled Bose-Einstein condensate

We study topologically non-trivial excitations of a weakly interacting, spin-orbit coupled BoseEinstein condensate in a two-dimensional square optical lattice, a system recently realized in experiment [W. Sun et al., Phys. Rev. Lett. 121, 150401 (2018)]. We focus on situations where the system is not subjected to a Zeeman field and thus does not exhibit nontrivial single-particle band topology. Of special interest then is the role of particle interaction as well as its interplay with the symmetry properties of the system in producing topologically non-trivial excitations. We find that the non-interacting system possesses a rich set of symmetries, including the PT symmetry, the modified dihedral point group symmetry D̃4 and the nonsymmorphic symmetry. These combined symmetries ensure the existence of pairs of degenerate Dirac points at the edge of Brillouin zone for the single-particle energy bands. In the presence of particle interaction and with sufficient spin-orbit coupling, the atoms condense in a ground state with net magnetization which spontaneously breaks the PT and D̃4 symmetry. We demonstrate that this symmetry breaking leads to a gap opening at the Dirac point for the Bogoliubov spectrum and consequentially topologically non-trivial excitations. We confirm the non-trivial topology by calculating the Chern numbers of the lowest excitation bands and show that gapless edge states form at the interface of systems characterized by different values of the Chern number.
Measuring the Affective and Cognitive Bases of Implicit and Explicit Attitudes Towards Domestic and Foreign Food Brands

The problem of accounting automatic affective and cognitive processes as bases for implicit attitudes towards brands, as well as methods for measuring them, is poorly developed. An analysis of previous research shows that the study of attitudes towards brands in terms of their affective and cognitive components is mainly carried out using self-assessment procedures. The aim of this research is to measure the affective and cognitive bases of implicit and explicit attitudes towards brands of domestic and foreign foods. Participants N = 131, aged 17-57 (Mdn = 31). Measures: specifically designed methodically balanced procedures for measuring implicit and explicit attitudes towards food brands: affective and cognitive implicit associative tests (IAT), Self-Concept IAT; emotional and cognitive explicit procedures and demographic questionnaires. The consistency of the results of implicit and explicit measurements is shown. The results of the measurements of implicit attitudes using three IAT procedures are related too. Using factor analysis, the independence of the constructs of explicit and implicit attitudes towards brands was confirmed, which is interpreted in terms of the theory of double attitudes. The greatest contribution to the implicit attitude, measured by the Self-concept IAT, is made by the cognitive component of attitude, which represents the implicit brand associations of domestic or foreign foods with attributes that characterize the price and quality of the foods. All implicit assessments obtained separately using the affective and cognitive procedures of the IAT, as well as the Self-concept IAT, testified in favour of the preference for foods of domestic brands. However, explicit assessments of the frequency of consumption of the brands under consideration did not reveal preferences for any of them. This discrepancy is seen not only as evidence of a possible ambivalent interaction between affective and cognitive associations, but also as an indication of the importance of future measurements of implicit assessments of instrumental associations that are the result of instrumental learning from consumers. This has the potential to improve the predictive validity of implicit measurements of brand attitudes and to better understand the structure of implicit consumer attitudes and the mechanisms of their influence on behaviour.
Evaluation of the presence of AmpC (FOX) beta-lactamase gene in clinical strains of Escherichia coli isolated from hospitalized patients in Tabriz, Iran

Background and purpose: Beta-lactamase enzymes inactivate beta-lactam antibiotics by hydrolyzing the central nucleus. AmpC-type beta-lactamases hydrolyze cephalosporins, penicillins, and cephamycins. Therefore, the aim of this study was to determine antibiotic resistance and to investigate the presence of AmpC beta-lactamase gene in clinical strains of Escherichia coli isolated from isolated from hospitalized patients in Tabriz. Materials and Methods: In this cross-sectional descriptive study, 289 E. coli specimens were collected from clinical specimens. Disk diffusion method and combined disk method were used to determine the phenotype of extended spectrum β-Lactamase producing (ESBLs) strains. Then PCR was used to evaluate the presence of AmpC (FOX) beta-lactamase gene in the strains confirmed in phenotypic tests. Antibiotic resistance was also determined using disk diffusion by the Kibry-Bauer method. Results: A total of 121 isolates were identified as generators of beta-lactamase genes. 72 (59.5 %) isolates producing ESBL and 49 (40.5 %) isolates were identified as AmpC generators. In the PCR test, 31 isolates contained the FOX gene. The highest resistance was related to the antibiotics amoxicillin (76.12%), ceftazidime (70.24%) and nalidixic acid (65.05%). Conclusion: The results indicate an increase in the prevalence of beta-lactamase genes and increased resistance to beta-lactam antibiotics, which can be the result of improper use of antibiotics and not using antibiotic susceptibility tests before starting treatment. Also, using phenotypic and molecular diagnostic methods such as PCR together can be very useful.
Sex Differences in Screen Time and Playfulness among Chinese Preschool Children

Past researches showed that there are sex differences in screen time and playfulness and it does affect children’s development. The purpose of the present study is to determine the sex differences in screen time and playfulness among Chinese preschool children in Kuala Lumpur. There were 217 mothers of Chinese preschool children aged between four to six years old study at selected private preschools in Kuala Lumpur were recruited as respondents in this study by using Stratified Proportionate Random Sampling technique. Self-administered questionnaire was distributed to mothers. Children’s screen time was assessed by using Screen Time Questionnaire (STQ), whereas the information of playfulness was collected by using Child Behavior Inventory of Playfulness (CBI). All instruments used in the current study showed good reliability in the local context with overall reliability score of above . 70. Independent t-test was used to determine the gender differences in screen time and playfulness. As the results, there was no significant gender difference in screen time (t = -1.25, p > .05) and playfulness (t = -1.46, p > .05). In sum, the study provides valuable information about screen time and playfulness among male and female preschool children.
Antibacterial and Antioxidant Activity of Cirsium Englerianum (Asteraceae), an Endemic Plant to Ethiopia

Background and objectives: Cirsium englerianum (Asteraceae) is an endemic medicinal plant to Ethiopia. It is used to treat skin infection, snake bite and cough. The aim of the present study was to evalute the bioactivity of root extracts of C. englerianum. Methods: Phythochemical screening tests were employed by standard protocols to identifiy the phythochemicals. Column chromatographic separation was used to isolate the compounds and the spectroscopic techniques (IR, NMR and ESMS) were used to elucidtae structures of the compounds. Disc diffusion technique was uesd to evalute antibacterial activity. In vitro antioxidant activity was assessed by 1, 1-diphenyl-2-picrylhydrazyl (DPPH), and phosphomolybdenun assays. The total flavonoids content was determined by aluminium chloride method. Results: Phytochemical screening tests revealed presence of alkaloids, steroids, terpenoids, tannins, and flavonoids in the acetone root extract. Column chromatographic separation of chloroform/methanol (1:1) extract offered stigmasterol (1), and stigmasteryl stearate (2). The acetone extract was potentially effective against the tested bacterial strains (Bacillus cereus, Staphylococcus aureus, Escherichia coli and Salmonella typhi) at all concentrations (25, 50 and 100 mg/mL). In vitro antioxidant activity attributed that the acetone extract showed DPPH scavenging (IC50 =154.44±74 µg/mL) and total antioxidant activity (8.24±0.9 mg of ascorbic acid equivalent per gram of dry extract). The total flavonoid content was observed in the range from 5.88 ±0.21 to 8.24±0.9 milligrams of catechin equivalents per gram of dry plant extract. Conclusion: Stigmasterol and stigmasteryl stearate were reported for the first time from this plant. The results proved that acetone extract exhibited potential antibacterial and antioxidant activity which correlated with inhibition zone diameter, and free radical scavenging activity.
Serum Levels of Interleukin 17 in Patients with Human Papilloma Virus Infection

Warts (verrucas) are an extremely common, benign, and usually self-limited skin disease. Infection of epidermal cells with the human papillomavirus (HPV) results in cell proliferation and a thickened, warty papule on the skin. The aim of this study was to evaluate serum levels of Interleukin 17 in patients with verrucas,correlate their levels with different demographic and clinical data. Method: This present study included: patient group(1) included 30 verruca patients. In addition,15apparently healthy, age and sex matched individuals included as a control group (Group 2). All patients were selected from outpatient clinic of Dermatology ans Andrology department of Benha University Hospital from Jan 2020 t0 July 2020. Informed consents were obtained from all participants. The study was approved by the local ethics committee on research involving human subjects, Faculty of Medicine , Benha University. Results and conclusion: it is concluded that IL 17 levels are lower in verruca patients than controls.
Crystal structure of Rb2NaAl6F21; a new term of the A2Na(AlxF3x+1)3 family (A=Rb, Cs)

Rb 2 NaAl 6 F 21 is monoclinic. The crystal structure was refined in spite of systematic twinning to R F =0.040 and R I =0.060. The twinning leads to a pseudo-rhombohedral symmetry by the rotation of 120 o around the c pseudo-hexagonal axis of three monoclinic domains
La construcción de una “nueva” mujer argelina: diario de una guerrillera

Este artículo busca analizar cómo desde la columna Journal d’une maquisarde (“Diario de una guerrillera”) -que apareció en el diario “El Moudjahid” durante los meses de junio y agosto de 1959, órgano oficial del FLN argelino-, se buscó recrear la imagen de una “nueva” mujer argelina. El hecho de tomar un texto fundacional elaborado en un contexto de guerra, nos permitirá reflexionar sobre la construcción de nuevas subjetividades en el corto plazo, ya sea para equilibrar tensiones y ansiedades generadas por la presencia de mujeres en la guerra, como para ir sentando las bases que sustentarían el rol de las mujeres luego de la independencia.
Analysis of Video CODEC Performance Using Different Softphone Applications

In a video call there are several components, such as IP phone or softphone, CODEC, and server. Selection of softphone and CODEC is a consideration in building a video communication network because it will affect the quality of video call. This research compare the quality of video calls based on softphone application and CODEC combination. The quality measured by QoS, PSNR, and MOS parameters.Softphone applications examined in this research are Blink, Zoiper, MicroSIP, PortGo, Linphone, and X-Lite. CODEC examined in this research are H.264, VP8, H.263+, and H.263. Each softphone application will be combined with a CODEC that is native to the softphone. There are nine combinations of softphone application and CODEC.Based on the research results, CODEC H.264 has the best performance when paired with the Blink softphone application. CODEC VP8 has the best performance when paired with the Zoiper softphone application. The H.263+ CODEC has the best performance when paired with the PortGo softphone application. The H.263 CODEC and X-Lite softphone applications have the worst test results but still get “good” grades when tested using QoS, PSNR, and MOS parameters.