Miracle-dz/UniFAR-FTUs huggingface dataset:
Unbeamed tidal disruption events at hard X-rays

Owing to their thermal emission, tidal disruption events (TDEs) were regularly detected in the soft X-rays and sometimes in the optical. Only a few TDEs have been detected at hard X-rays: two are high redshift beamed events, one of which occurred at the core of a nearby galaxy, and the most recent one is of a different nature, involving a compact object in the Milky Way. The aims of this work are to obtain a first sample of hard X-ray-selected unbeamed TDEs, to determine their frequency and to probe whether TDEs usually or exceptionally emit at hard X-ray energies. We performed extensive searches for hard X-ray flares at positions in over 53000 galaxies, up to a distance of 100 Mpc in the Swift BAT archive. Light curves were extracted and parametrized. The quiescent hard X-ray emission was used to exclude persistently active galactic nuclei. Significant flares from non-active galaxies were derived and checked for possible contamination. We found a sample of nine TDE candidates, which translates into a rate of $2 \times 10^{-5}\,{\rm galaxy}^{-1}\,{\rm yr}^{-1}$ above the BAT detection limit. This rate is consistent with those observed by XMM-Newton at soft X-rays and in the optical from SDSS observations, and is as expected from simulations. We conclude that hard X-ray emission should be ubiquitous in un-beamed TDEs and that electrons should be accelerated in their accretion flow.
Accurate Analysis of Dielectric Backed Planar Conducting Layers of Arbitrarily Shaped in a Rectangular Waveguide

The characteristics of dielectric backed planar conducting layers of arbitrarily shaped in a rectangular waveguide are calculated by means of coupled integral equation technique (CIET) which accurately takes higher order mode interactions. Spectral dyadic green's functions are derived for these equivalent structures. A coupled magnetic filed integral equation formulation is proposed which is solved using method of moment (MoM). Then one matrix equation that involves the all magnetic currents of non metallic parts (aperture parts) of discontinuities is derived. This single matrix formulation replaces the procedure of cascading individual GSM's of each block. By dividing the area of cross section in discontinuities into a given number of subsections, it is possible to model any shape of metallic parts. The proposed technique permits modeling of a variety of structures such as cavity-backed micro strip antenna, frequency selective surfaces (FSS's), waveguide filters with printed irises and generally multilayered media with printed circuits embedded between dielectric layers in a waveguide. The usefulness of the proposed method and its performance are verified by calculating and simulating of a given structure.
A Composite Fuzzy Indicator for Assessing Farm Household Potential for Non-farm Income Diversification

European politicians encourage the income diversification of rural households through various measures. Although being aware of farm households’ potential for non-farm income diversification seems important for finely-targeting such policy measures, no attempt has thus far been made to summarise the various determinants of income diversification in a single figure. This contribution aims to close this gap. A composite fuzzy indicator that measures farm household potential for non-farm income diversification is developed and applied to 1,053 farm households in Bulgaria, Hungary, Poland, Romania, and Slovenia. The indicator summarises the incentives of and capacities for non-farm income diversification on the individual household member level, and on the household and regional levels to a single measure using fuzzy logic methodology. The composite fuzzy indicator performs well, and the results for the single farm households can easily be retraced. The indicator not only singles out the households that have the potential for non-farm income diversification, but also shows the reasons for this. Thus, the result for 1,053 farm households is not only that most of them have a high potential for non-farm income diversification, but also that the majority of these households are pushed in diversification due to the smallness of their farms. Only a few of the farm households act under pull conditions, i.e. diversification is not a necessity, but they could opt for profitable non-farm employment due to favourable age, education, and regional conditions. Decision-makers could utilise the composite fuzzy indicator to finely-target diversification measures to the multifaceted conditions of farm households.
Intraspecific Variability in Paradoxidid Trilobites from the Purujosa Trilobite Assemblage (Middle Cambrian, Northeast Spain)

Eccaparadoxides? pradoanus and Eccaparadoxides mediterraneus are both widespread trilobite species described from the middle Cambrian of the Mediterranean region. Analysis based on a pooled sample of 500 specimens demonstrates that many of the characters that have been used to define these species show continuous variations, some of which are related to ontogeny. In addition, morphometric analyses of metric characters show that the two species cannot be distinguished on the basis of these characters either. Many of the characters studied herein are widely used in definitions and descriptions of other paradoxidid species, which suggests that the taxonomic classification of other paradoxidids may be oversplit.
A mobile virtual character with emotion-aware strategies for human-robot interaction

Emotions may play an important role in humanrobot interaction, especially with social robots. Although the emotion recognition problem has been massively studied, few research is aimed at investigating interaction strategies produced as response to inferred emotional states. The work described in this paper consists on conceiving and evaluating a dynamic in which, according to the user emotional state inferred through facial expressions analysis, two distinct interaction strategies are associated to a virtual character. An Android app, whose development is in progress, aggregates the user interface and interactive features. We have performed user experiments to evaluate whether the proposed dynamic is effective in producing more natural and empathic interaction.
L G ] 1 2 M ar 2 01 8 Probabilistic and Regularized Graph Convolutional Networks ( L 42 Michaelmas 2017 )

This paper explores the recently proposed Graph Convolutional Network architecture proposed in (Kipf & Welling, 2016) The key points of their work is summarized and their results are reproduced. Graph regularization and alternative graph convolution approaches are explored. I find that explicit graph regularization was correctly rejected by (Kipf & Welling, 2016). I attempt to improve the performance of GCN by approximating a k-step transition matrix in place of the normalized graph laplacian, but I fail to find positive results. Nonetheless, the performance of several configurations of this GCN variation is shown for the Cora, Citeseer, and Pubmed datasets.
Vibrational spectroscopy of a harmonic oscillator system nonlinearly coupled to a heat bath

Vibrational relaxation of a harmonic oscillator nonlinearly coupled to a heat bath is investigated by the Gaussian–Markovian quantum Fokker–Planck equation approach. The system–bath interaction is assumed to be linear in the bath coordinate, but linear plus square in the system coordinate modeling the elastic and inelastic relaxation mechanisms. Interplay of the two relaxation processes induced by the linear–linear and square–linear interactions in Raman or infrared spectra is discussed for various system–bath couplings, temperatures, and correlation times for the bath fluctuations. The one-quantum coherence state created through the interaction with the pump laser pulse relaxes through different pathways in accordance with the mechanisms of the system–bath interactions. Relations between the present theory, Redfield theory, and stochastic theory are also discussed.
Financing Housing Improvement in Urban Ghana : Experiences from the Rental Sector in Accra and Takoradi

Ghana, a low-income country, experiences several unsatisfactory situations in urbi,m housing provision as a result of rapid population growth, a poor economy and persisting poverty as well as lack of effective and consistent public policy formulation and implementation. This paper looks at the housing conditions and upgrading.financing in the rental housing sector, the largest and most affordable segment of the country's urban housing market, using the experiences of two of the country's largest urban centres. The findings presented here are based on the analysis of questionnaires that were administered to 200 landlords and 200 tenant households in four low-income communities within the study areas. The analysis reveals that the majority of low-income urban households live in rented accommodation, usually of substandard quality. Landlords are generally willing to upgrade their rental units but are largely constrained by lack of access to finance. The provision of easy access to housing finance in the form of micro-credit, participation in savings and credit cooperative schemes along with community involvement are the options suggested by the paper for achieving sufficient and good quality housing for the urban poor. At the same time the paper recognises strong political commitment and support through local authorities as preconditions for sustainable urban housing delivery. a. Department of Environment and Resource Studies, University for Development Studies, P. 0. Box 520, Wa, Ghana Email: osmankantonfci),vahoo. co. uk 2 Ghana Journal ofGcograph~ \111. :? ::WIU
Assessing the Effect of Knowledge Acquisition on Competitive Advantage: A Knowledge-Based and Resource-Based Study

The sustainability of competitive advantage is known to be influenced by knowledge-based threats like imitation, substitution, hold-up and slack. Strategic management researchers have relied on the “resource-based view” and the “knowledge-based view” to explain how to avoid these threats since tangible/intangible assets and intangible capabilities contribute to the achievement of competitive advantage. This reasoning has further given rise to the question “why do some firm’s outperform others? ” Thus, owing to the increase in the employment of knowledge workers, the use of Information and Communication Technology (ICT) in service delivery, and the upsurge in the number of hotels in the hospitality industry in Benue State, this study assessed the relationship between knowledge acquisition and competitive advantage. The study adopted ex-post-facto research design and multi-stage sampling technique to select the elements that completed the questionnaire from the population of employees of the selected hotels. The validity and reliability of the questionnaire was confirmed using Kaiser-Mayer-Olin (KMO), Bartlett and Cronbach alpha tests. Linear regression statistical method was employed to test the research hypothesis. It was found that knowledge acquisition is significantly related to competitive advantage. In view of this, hoteliers and hotel managers should employ ICT systems, skilled knowledge workers and all other relevant knowledge management resources that will further help to enhance knowledge acquisition. At every point in time, efforts should be made to acquire modern and latest systems and to improve employees’ skills through training and retraining. Again, a cordial relationship between employees/managers and customers/the general public should be encouraged to ensure free flow of relevant information/knowledge from the customers/public to the organization. Keywords: Knowledge acquisition, Competitive advantage, Knowledge-based view, Resource-based view
A LOW-LOSS PATCH LTCC BPF FOR 60 GHz SYSTEM- ON-PACKAGE (SOP) APPLICATIONS

In this paper, a three-dimensional (3-D) low-loss and wideband BPF based on lowtemperature co-fired ceramic (LTCC) has been presented for 60GHz wireless communication applications. Via pads in the vertical via transitions are designed as an additional resonator for lowloss and wide-bandwidth of the BPF. The proposed BPF has been designed by investigating its characteristics as a function of dimensions of the resonators such as a single-mode patch and via pads and also a length of feed lines are optimized for effective coupling. The designed BPF was fabricated in a 6-layer LTCC dielectric. The fabricated BPF shows a centre frequency (fc) of 61.46 GHz and a 3 dB bandwidth of 10.5% from 58.2 to 64.7 GHz (6.47GHz). An insertion loss of −2.88 dB at fc and return losses below −10 dB are achieved. Its whole size is 4.72× 1.7× 0.684mm3.
Utility of Hovmöller diagrams to diagnose Rossby wave trains

The study investigates and compares various methods that aim to diagnose Rossby wave trains with the help of Hovmöller diagrams. Three groups of methods are distinguished: The first group contains trough-and-ridge Hovmöller diagrams of the meridional wind; they provide full phase information, but differ in the method for latitudinal averaging or weighting. The second group aims to identify Rossby wave trains as a whole, discounting individual troughs and ridges. The third group contains diagnostics which focus on physical mechanisms during the different phases of a Rossby wave train life cycle; they include the analysis of eddy kinetic energy and methods for quantifying Rossby wave
Determination of antibacterial activity in rhizome of plant Aechmea magdalenae (andre) andre ex baker

Recently, due to the evolution of disease-causing agents and the failure of the available antimicrobials, researchers have been focusing more on investigating natural products as alternatives to synthetic medicines. These natural products could be used to supply new bioactive molecules (Silver and Bostian, 1993; Recio and Rois, 1989). An ethnobotanical approach to drug discovery can involve focusing pharmacological research on plants used traditionally by local or indigenous people to treat ailments (Balick and Cox, 1997). Such research has often revealed that many traditional medicinal plants have strong antimicrobial effects and are important sources of many such bioactive chemical compounds (Webster et al., 2008). Many herbaceous plants belonging to the family Bromeliaceae have antibacterial and antioxidant properties (Santana et al., 2012). The Bromeliaceae family has nearly 3172 species and 58 genera which are grouped into eight subfamilies (Luther, 2008; Givnish et al., 2011). The phytochemical investigation of the family Bromeliaceae has resulted in the isolation of mainly flavonoids and triterpenoids (Manetti et al., 2009). These studies demonstrate a correlation of the phytochemistry with the biological properties of the plants from the family Bromeliaceae.
Research of an Improved Association Rules for Mining Mass Pipe Data

Nowadays, accompany the enormous data from Internet and Website. Among which is the pipeline data from city cyber info. There’re some relevance formula inherent in the pipeline info or pipeline data. These relevance formula can be divided into several types. This paper proposed and applied an alignment arithmetic models with increase progressively arithmetic named as FP4-DEEP. A reduction way is provided for the calculation of relation pipeline info by the correlation of inter-transaction list. Test shows its validation and feasibility. In this paper, we will explain the arithmetic and its optimized model. The inherent and expedient novel info is able to be found, and novel model will be generated. Those formula found in pipeline data is capable of conceivable used as the comprehensive DSS methods.
Tomato and Tobacco Phytoene Desaturase Gene Silencing by Virus-Induced Gene Silencing (VIGS) Technique

Background and Aims: Virus-Induced Gene Silencing (VIGS) is a virus vector technology that exploits antiviral defense mechanism. By infecting plants with recombinant viruses containing host genes inserted in the viral genome, VIGS achieves the RNA silencing process. The purpose of this study was to investigate the possibility of tomato (Lycopersicon esculentum Mill.) and tobacco (Nicotiana benthamiana) phytoene desaturase (PDS) gene silencing, using VIGS technique by VIGS vector containing tomato PDS. Methods: PDS gene encodes one of the important enzymes in the carotenoid biosynthesis pathway. In this method Tobacco rattle tobravirus (TRV) vectors including pTRV1 ،pTRV2 and pTRV2PDS were used. The pTRV2PDS vector carried inserts derived from tomato PDS gene. Vectors were transformed into Escherichia coli strain DH5α. Agrobacterium tumefaciens strain GV3101 cells were transformed by the vectors containing specific genes. Results: Colony PCR with specific primers proved the presence of the PDS and RNAdependent RNA polymerase genes in selected agrobacterium random colonies. Agrobactrium containing pTRV1 ،pTRV2 and pTRV2PDS was inoculated into induction media culture. Finally, acetosyringone was added to pTRV1 culture and then pTRV1 and pTRV2PDS cultures mixed in a 1:1 ratio. Mixed culture was infiltrated into the test plant seedlings using 1ml needless syringe. Conclusion: Results showed the gene silencing in the form of photobleaching and mosaic occurred in tomato and tobacco plant leaves, respectively. However, plant infiltration with pTRV1 and pTRV2 (without PDS gene as control) mixed culture did not show any photobleaching.
Mixed logit approach to modeling arrival time choice behavior of cemetery and columbarium visitors during grave-sweeping festivals

Special events attract extraordinarily high travel demands over a relatively short time. Managing the travel demand for special events is more difficult than for normal commuting trips. Grave-sweeping is a special event that is popular in Asia, especially in Chinese societies. In Hong Kong, many people visit cemeteries and columbaria around the two traditional festivals, causing overcrowding at the sites and congestion on the access roads. To mitigate the adverse traffic effects, the police usually implement temporary traffic management measures to control the number of visitors accessing the sites. However, these measures often ignore visitors’ arrival time preferences and hence their effectiveness is questionable. This study models and analyzes the arrival time preferences of cemetery and columbarium visitors under various transport mode scenarios. The model development is based on 3,128 choice decisions collected from 782 respondents. A mixed logit model is calibrated to investigate the potential taste heterogeneity of the respondents, and a likelihood ratio test demonstrates that the model is superior to a standard multinomial logit model and provides a better fit to the survey data. The model results indicate that in-vehicle travel time, total waiting and walking time, and the provision and travel fare of feeder services are significant factors influencing cemetery and columbarium visitors’ arrival time choices. The effects of socio-economic factors are also examined and discussed. Based on the model results, recommendations are provided for managing the travel demand to cemeteries and columbaria at peak and off-peak hours on or around festival days.
Searching for X-ray emission from AGB stars

Context. Magnetic fields have been measured around asymptotic giant branch (AGB) stars of all chemical types using maser polarization observations. If present, a large-scale magnetic field would lead to X-ray emission, which should be observable using current X-ray observatories. Aims. The aim is to search the archival data for AGB stars that are intrinsic X-ray emitters. Methods. We have searched the ROSAT, CXO, and XMM-Newton archives for serendipitous X-ray observations of a sample of similar to 500 AGB stars. We specifically searched for the AGB stars detected with GALEX. The data is calibrated, analyzed and the X-ray luminosities and temperatures are estimated as functions of the circumstellar absorption. Results. We identify 13 AGB stars as having either serendipitous or targeted observations in the X-ray data archives, however for a majority of the sources the detailed analysis show that the detections are questionable. Two new sources are detected by ROSAT: T Dra and R UMa. The spectral analysis suggests that the emission associated with these sources could be due to coronal activity or interaction across a binary system. Conclusions. Further observations of the detected sources are necessary to clearly determine the origin of the X-ray emission. Moreover, additional objects should be subject to targeted X-ray observations in order to achieve better constraints for the magnetic fields around AGB stars.
EEWES: An energy-efficient wireless sensor network embedded system to be applied on industrial environments EEWES: Un sistema integrado para red de sensores inalámbricos con eficiencia de energía aplicado en entornos industriales

Nowadays, the vast majority of information monitoring in industrial plants is still carried out by wired technologies, in which the installation and maintenance cost is high. However, in outdoor applications, such as those used in the oil and gas industry, the use of Wireless Sensor Networks (WSN) is increasing due to mobility, reliability, and low cost of the sensor nodes that make up the network. Moreover, this solution reduces the risks of workers in classified areas (regions with high probability of accidents occurrence) to the extent that the equipment maintenance is optimized. This paper proposes the development of the EEWES, an energy efficient wire less sensor network embedded system, which can be applied on industrial environments. This development approach significantly reduces the energy consumption of the sensor nodes by using a method that alternates sleep periods of the transceiver/sensor set with data transmission/reception periods, which reduces the duty cycle while keeping the desirable parameters of the service quality (QoS). The results presented in this paper will be confirmed by field tests.
Enterprise Resource Planning (ERP) Systems in Banking Industry: Implementations Approaches, Reasons for Failures and How to Avoid Them

Implementing an enterprise resource planning (ERP) system proven to have visible benefits (business integration, reduce operational cost, business flexibility and much more) that can be seen by many organizations, but the success of its implementation can only be realized by avoiding the common motive that lead to its failure. This paper explained various aspects that lead to ERP system implementation failure which includes inadequate requirements definition, end-users resistance to adapting to new methods, lack of top-management support. Different approaches are used in the implementation of ERP system such as comprehensive, pilot, and phased approach but the successful implementation of ERP system depend on the organizational nature. Enormous amount of time and money have been invested on ERP implementation by many organization only to see the performance remain stagnant due to the incompatible approach to the implementation process. ERP system is a long process and for the duration of implementation the performance of daily organization activities can degenerate, there are a lot of risk that are involved in new business process; therefore various recommendation on how to avoid the ERP failures are discussed.
Leveraging Business Intelligence for Organizational Performance the Emerging Economy Context

Business intelligence is a promising style extensively used in decision-making processes. The application of Business Intelligence (BI) is growing at an incredible rate in developed countries but its exposure in emerging economies, like India, is still low. The impact of business intelligence technology on the decision-making process and ultimately on the organizational performance has been studied by many authors in various economies, but still, is a subject to be investigated in India. There are studies that say emerging markets are going to be new drivers of economic growth in upcoming future. This study is an attempt to evaluate the impact of business intelligence technology achieved by organizations in an emerging economy i