Miracle-dz/UniFAR-FTUs huggingface dataset:
Nonlinearly coupled whistlers and dust-acoustic perturbations in dusty plasmas

The nonlinear interaction between magnetic-field-aligned coherent whistlers and dust-acoustic perturbations (DAPs) in a magnetized dusty plasma is considered. The interaction is governed by a pair of equations consisting of a nonlinear Schrodinger equation for the modulated whistler wave packet and an equation for the nonresonant DAPs in the presence of the ponderomotive force generated by the whistlers. The coupled equations are employed to investigate the occurrence of modulational instability, in addition to the formation of whistler envelope solitons. This investigation is relevant to amplitude modulated electron whistlers in magnetized space dusty plasmas.
Evaluation of world health organization grading system in estimating the severity of dengue in adults in a tertiary care centre

Objectives: (1) To study the profile of dengue fever in patients admitted to a tertiary care centre. (2)To assess the performance of WHO classification in estimating the severity of dengue (3) To know the outcome of patients according to WHO grading for dengue fever. Background: Dengue virus infection causes a spectrum of clinical manifestations, usually classified according to the World Health Organization (WHO) grading system. We aimed to evaluate the WHO grading system in estimating the severity of dengue in adults in a tertiary centre. Methods: Our study included 88 laboratory confirmed cases of dengue infection. WHO criteria were applied to classify patients into Dengue Fever (DF), Dengue Hemorrhagic Fever (DHF) and Dengue Shock Syndrome (DSS). Patients were followed up with clinical and laboratory monitoring until discharge or death. We also grouped patients on the basis of whether they received significant intervention based on fluid replacement or requirements for blood transfusion. Results: Out of 88 patients, 36.3% of patients were found to have dengue fever, 56.7% with DHF, 10.2% with DSS. Plasma leakage and thrombocytopenia were significant factors in differentiating dengue from DHF, DSS. Majority of patients with DHF, DSS required interventions like fluid resuscitation and blood transfusion. Mean duration of hospital stay was longer in DHF, DSS. Conclusion: In a tertiary care centre, WHO criteria for grading of dengue can estimate the severity of dengue, helps us to segregate the patients who need aggressive management.
Evaluating the efficacy of lysozyme against lactic acid bacteria under different winemaking scenarios

This study evaluated the efficacy of lysozyme in winemaking to control lactic acid bacteria (LAB). In a winery vinification, indigenous LAB were partially and completely inhibited when lysozyme was added to red and white grape must respectively. This result was confirmed by using two selected strains of Lactobacillus brevis and Oenococcus oeni to contaminate the grape must. In the red wine microvinification, the cell population decreased only temporarily and malolactic fermentation terminated at different times, depending on the grape must pH and lysozyme dosage. In the white wine microvinification, cell mortality rates differed according to lysozyme dosage rather than pH values. During the fermentation, lysozyme activity was stable or decreased, depending on the absence or presence of grape must respectively. The study highlighted that lysozyme efficacy is strongly affected by the type of vinification.
Lecture absenteeism among students in higher education: a valuable route to understanding student motivation

The reasons associated with lecture absenteeism among student groups could shed significant light on student motivation levels and orientations in university settings. Paying attention to the rationales for lecture absence provided by students themselves could also help institutions to diagnose levels of student engagement and respond in appropriate ways. This study demonstrates these assertions by engaging in a critical analysis of the evidence linking lecture attendance and academic performance, using a qualitative analysis of student accounts of their absenteeism. It argues that innovative approaches to higher education would benefit from the extension and development of this kind of inquiry.
How Agile Workers Make Sense of Managerial Communication

TITLE How Agile Workers Make Sense of Managerial Communication AUTHORS Anna Hagberg, Yang Li & Farah Khanjar SUPERVISOR Katie Sullivan DATE 23rd May 2014 PURPOSE The purpose of the research project is to contribute to agile communication theory with insights about how agile workers make sense of managerial communication. RELEVANCE Due to the rapid changes organizations in the software development industry are now facing, the use of agile practices has become popular. Also, taking the agile workers perspective has a tendency to be neglected in literature on agile practices. METHODOLOGY This qualitative research has been conducted with an interpretative approach, using an abductive method when working with data and theory. In total, we conducted 12 semi-structured interviews and analyzed them using hermeneutics. FINDINGS We discovered that there is a tension between agile workers and management and also that managers should use a mix of communication channels when communicating with agile workers. CONTRIBUTIONS We contributed with an in-depth understanding of how agile workers make sense of managerial communication. We also contributed to literature on agile practices by identifying the tension between the self-organized teams and management, specifically in large-sized companies. KEY-WORDS Agile workers, agile communication, agile practices, self-organized teams, managers, SCRUM, managerial communication
Involuntary nonconformity as a construct in social stress and learning.

University of Windsor MANNELL, ROGER CHARLES Involuntary Nonconformity as a Construct in Social Stress and Learning, University of Windsor, 1971. 5^ PP. (James Duthie) The present study was designed to investigate the invo­ luntary nonconformity construct empirically to determine if practice and socially Induced stress influenced its effect. An experimental task was devised which required the subjects to make simultaneous responses to two sets of stimuli and allowed two levels of automation and socially induced stress to be presented to the subjects. The two groups under condi­ tions of automation produced a significantly larger number of inappropriate responses in the test trials than the non­ automated control groups. Practice and socially induced stress both tended to reduce the number of inappropriate res­ ponses produced in the test trials. The differences were significant at the 0.01 level and indicate that the involun­ tary nonconformity construct provides a parsimonious explana­ tion of the inappropriate responses which occurred. The ability of social stress to buffer nonconforming responses is further indication of the value of the construct in explaining behavior in situations in which the individual wishes to conform but may be unable to do so. The findings may have application in many areas of sports where rules may be regarded as codified norms and highly rehearsed behavior
Stochastic Moderated Regression: An Efficient Methodology for Estimating Parameters in Moderated Regression

In moderated regressions, the effect of a focal variable x1 depends on the level of a moderator variable x2. Moderation is estimated by introducing the product term of the two variables (x1x2) as an independent variable in the regression equation. Such moderator regressions often suffer from multicollinearity due to the usually high correlation between the product term and its components. We propose to recognize explicitly the stochastic nature of moderating effects to derive more efficient estimates of all the effects in the Stochastic Moderated Regression model (SMR). Using Monte-Carlo simulations, we assess the ability to extract better inference about these effects under different conditions of stochasticity at different levels of the moderating effect. In addition, because of the inability to remove the collinearity inherent in the model specification itself (having a product term and its components in the same model), we evaluate the impact of introducing (or removing) terms in the model specification on the significance of these effects.
Improved Hubble Space Telescope Proper Motions for Tycho-G and Other Stars in the Remnant of Tycho's Supernova 1572

With archival and new Hubble Space Telescope observations we have refined the space-velocity measurements of the stars in the central region of the remnant of Tycho’s supernova (SN) 1572, one of the historical Galactic Type Ia supernova remnants (SNRs). We derived a proper motion for Tycho-G of (µ� cos�;µ�)J2000.0 = ( 2.63; 3.98)±(0.06;0.04) [formal errors] ± (0.18;0.10) [expected errors] mas yr −1 . We also reconstruct the binary orbit that Tycho-G should have followed if it were the surviving companion of SN 1572. We redetermine the Ni abundance of this star and compare it with new abundance data from stars of the Galactic disk, finding that [Ni/Fe] is about 1.7� above the Galactic trend. From the high velocity (vb = 50±14 km s −1 ) of Tycho-G perpendicular to the Galactic plane, its metallicity, and its Ni excess, we find the probability of its being a chance interloper to be P < � 0.00037 at most. The projected rotational velocity of the star should be below current observational limits. The projected position of Tycho-G is, within the uncertainties, consistent with the centroid of the X-ray emission of Tycho’s SNR; moreover, its brightness is generally consistent with the post-explosion evolution of the luminosity of a SN companion. Among the other 23 stars having V < 22 mag and located within 42 ′′ from the X-ray centroid, only 4 are at distances compatible with that of the SNR, and none of them shows any peculiarity. Therefore, if even Tycho-G is not the surviving companion of SN 1572, the absence of other viable candidates does favor the merging of two white dwarfs as the producer of the SN.
In vitro EFFECTS OF SODIUM HYPOCHLORITE, TRISODIUM PHOSPHATE AND ORGANIC ACIDS ON THE DECONTAMINATION OF Salmonella enterica Serovar Enteritidis ON CHICKEN SKIN

This study was conducted to evaluate the effectiveness of five chemical disinfectants, including sodium hypochlorite (CL), trisodium phosphate (TSP) and organic acids; acetic acid (AA), citric acid (CA) and lactic acid (LA), in reducing of the contamination level of Salmonella enterica Serovar Enteritidis (S. Enteritidis) on chicken skin. Chicken drumsticks were artificially contaminated with the kanamycin resistant S. Enteritidis (SEnKmr) to obtain 105-106 CFU/cm2. The five disinfectants used were: CL; 25, 50 and 100 ppm, TSP; 4, 8 and 12%, AA, LA and CA; 0.6, 1.2 and 2.4%. The disinfectants were applied by either dipping for 1, 3 and 5 min or spraying for 10 s. The number of viable cells were enumerated after 30 min incubation at room temperature (RT;ca 25oC) and compared to that from untreated controls. The results showed good potential for 4% and 8% TSP and 0.6% and 1.2% acetic acid, lactic acid and citric acid, as disinfectants that caused no changes in the physical appearance of the skin. Serovar Enteritidis cells were inhibited most when dipped for 5 min or sprayed with 2.4% acetic acid (1.70 and 1.78 log CFU/cm2 reduction, respectively). Chicken carcasses sprayed with 2.4% AA were further investigated by storage at RT for 1, 6 and 24 h and at 4oC for 1, 24, 72 and 120 h. The surviving cells were enumerated at the specified times. Storage at 4oC produced a rapid loss of viable cells, with no detectable viability after 120 h. A combination of spraying with disinfectants and 4oC storage prolonged the activity of the disinfectants. The results support the benefit of decontamination and warrant further research.
Quantifying Measurement Fluctuations from Stochastic Surface Processes on Sensors with Heterogeneous Sensitivity

Recent advances in micro- and nanotechnology have enabled the development of ultrasensitive sensors capable of detecting small numbers of species. In general, however, the response induced by the random adsorption of a small number of objects onto the surface of such sensors results in significant fluctuations due to the heterogeneous sensitivity inherent to many such sensors coupled to statistical fluctuations in the particle number. At present, this issue is addressed by considering either the limit of very large numbers of analytes, where fluctuations vanish, or the converse limit, where the sensor response is governed by individual analytes. Many cases of practical interest, however, fall between these two limits and remain challenging to analyze. Here, we address this limitation by deriving a general theoretical framework for quantifying measurement variations on mechanical resonators resulting from statistical-number fluctuations of analyte species. Our results provide insights into the stochastic processes in the sensing environment and offer opportunities to improve the performance of mechanical-resonator-based sensors. This metric can be used, among others, to aid in the design of robust sensor platforms to reach ultrahigh-resolution measurements using an array of sensors. These concepts, illustrated here in the context of biosensing, are general and can therefore be adapted and extended to other sensors with heterogeneous sensitivity.
Stem Cells a Hope for Cell Therapy and Regenerative MedicineLEJANDRO SOTO GUTIÉRREZ, NALU NAVARRO ÁLVAREZ,

In the 1960´s when the idea of using isolated cells to treat sickness(1) and the observation of the existence of multipotentiality in embryonal carcinomas(2), a new era in the history of medicine and cell biology began. The shortage of donors and the need to assist all patients that are organ transplantation waiting lists have inspired researchers and clinicians to look for the perfect and universal cell source for cell therapy(3). Cell therapy and regenerative medicine have adopted the concept of stem cells for over 100 years
New FES-Assisted Knee Swinging Ergometer for Stroke Patient: A Design and Simulation Study

This paper presents the development of a model of knee swinging ergometer for stroke patient. Knee swinging ergometer is introduced as a hybrid exercise for restoration of function of the knee for stroke patients through the application of functional electrical stimulation. The aim of the new FES-assisted knee swinging ergometer is to provide high intensity exercise. This will elongate the exercise duration and avoid early muscle fatigue. The ergometer is designed to utilize the voluntary non-paretic leg movement in assisting the FES-induced paretic leg of stroke patient. A humanoid with muscle model was developed and incorporated with the ergometer to perform simulation of FES-assisted knee swinging exercise. PID controller is used to achieve full knee extension during each cycle of knee swinging exercise. Simulation results show that the ergometer is able to reduce half of the required electrical stimulation. In conclusion, the new knee swinging ergometer is able to avoid early muscle fatigue in performing high intensity knee exercise through electrical stimulation. DOI: http://dx.doi. org/10.5755/j01.eee. 20.1. 6168
Decision support system for zero-day attack response

Regardless of the existence of the various information security safeguards, many companies remain vulnerable to the unknown attack, which is known as the zero-day attack. In this study, we develop the decision support system (DSS) using case-based reasoning (CBR) for zero-day attack response. Also, our proposed system divides the unknown attack into atomic attacks for zero- day attack detection. Then, this proposed system analyzes the similarity between the new zero-day attack pattern and the known attack patterns. Finally, it suggests the most similar cases with applying similarity functions and CBR. The effectiveness of our system is further shown in the empirical test.
Agricultural Productivity and Anticipated Climate Change in Sub-Saharan Africa: A Spatial Sample Selection Model

A cereal yield response function is estimated conditional upon environmental and topographical features to detect the effects of spatial heterogeneity and spatial dependence in explaining agricultural productivity across Sub-Saharan Africa. Controlling for direct and localized spillover effects, we then estimate the effect that projected changes in temperature and precipitation as a result of global climate change will have on agricultural production. We find that the estimated declines found in the climatological literature may overestimate actual declines, and factors such as spatial heterogeneity (i.e., country fixed effects) are profoundly more important to agricultural production.
Stratospheric aerosol radiative forcing simulated by the chemistry climate model EMAC using Aerosol CCI satellite data

Abstract. This paper presents decadal simulations of stratospheric and tropospheric aerosol and its radiative effects by the chemistry general circulation model EMAC constrained with satellite observations in the framework of the ESA Aerosol CCI project such as GOMOS (Global Ozone Monitoring by Occultation of Stars) and (A)ATSR ((Advanced) Along Track Scanning Radiometer) on the ENVISAT (European Environmental Satellite), IASI (Infrared Atmospheric Sounding Interferometer) on MetOp (Meteorological Operational Satellite), and, additionally, OSIRIS (Optical Spectrograph and InfraRed Imaging System). In contrast to most other studies, the extinctions and optical depths from the model are compared to the observations at the original wavelengths of the satellite instruments covering the range from the UV (ultraviolet) to terrestrial IR (infrared). This avoids conversion artifacts and provides additional constraints for model aerosol and interpretation of the observations. MIPAS (Michelson Interferometer for Passive Atmospheric Sounding) SO2 limb measurements are used to identify plumes of more than 200 volcanic eruptions. These three-dimensional SO2 plumes are added to the model SO2 at the eruption times. The interannual variability in aerosol extinction in the lower stratosphere, and of stratospheric aerosol radiative forcing at the tropopause, is dominated by the volcanoes. To explain the seasonal cycle of the GOMOS and OSIRIS observations, desert dust simulated by a new approach and transported to the lowermost stratosphere by the Asian summer monsoon and tropical convection turns out to be essential. This also applies to the radiative heating by aerosol in the lowermost stratosphere. The existence of wet dust aerosol in the lowermost stratosphere is indicated by the patterns of the wavelength dependence of extinction in observations and simulations. Additional comparison with (A)ATSR total aerosol optical depth at different wavelengths and IASI dust optical depth demonstrates that the model is able to represent stratospheric as well as tropospheric aerosol consistently.
Dividend and Debt policy as Corporate Govemance Mechanism: Indonesian Evidence

This study examines the effectiveness of dividend and debt policies as corporate governance mechanisms to reduce agency conflict. Indonesia is significant for such a study because it provides a setting where the tendency for agency problems is high. using purposive sampling method, this study selects 187 firms which stocks are listed on Indonesia stock Exchange between 2002 until 2006. This study employs event study method and regression analysis to test its hypotheses. The results suggest that dividend policy can be used as a corporate governance mechanism to mitigate agency conflict as far as its impact on market performance is concerned, in all firms and particularly so in firms with high concentrated ownership structure.Debt policy fails to serve as a corporate governance mechanism except infirms with high concentrated ownership structure and when concerns profitability. with the viability of financial policies'function as effective corporate governance mechanisms have yet to be verified, the Indonesian capital Market-Regulatory Board needs to rely on and/or formulate other corporate governance mechanisms to regulate the conducts of the firms. ABSTRAK Kajian ini menguji keberkesanan dasar dividen dan hutang sebagai mekanisme tadbir urus untuk mengurangkan konflik agensi. Indonesia penting bagi kajian sedemikian kerana ia menyediakan situasi yang mana kecenderungan masalah agensi wujud adalah tinggi. Menggunakan kaedah pensampelan bertujuan, kajian ini memilih 187 firma yang sahamnya tersenarai di Bursa saham Indonesia antara tahun 2002 hingga 2006. Kajian ini menggunakan kaedah kajian peristiwa dan analisis regresi untuk menguji hipotesisnya. Hasil kajian menyarankan dasar dividen boleh digunakan sebagai mekanisme tadbir urus untuk mengurangkan konflik agensi berdasarkan kepada kesannya terhadap prestasi pasaran, dalam semua firma tetapi khuswnya dalam firma yang mempunyai struktur pemilikan terpusat yang tinggi. Dasar hutang gagal menjadi mekanisme tadbir urus kecuali dalam firma yang mempunyai struktur pemilikan terpusat yang tinggi dan apabila melibatkan keuntungan. Dengan kesesuaian dasar-dasar kewangan berfungsi sebagai mekanisme tadbir urus masih perlu diuji kesahihannya, Badan Pengawas Pasaran Modal (BAPEPAM) Indonesia perlu bergantung kepada dan/atau memformulasi mekanisme tadbir urus yang lain untuk mengawasi tindak-tanduk firma-firmanya.
Defending against Malicious Threats in Wireless Sensor Network: A Mathematical Model

Wireless Sensor Networks offer a powerful combination of distributed sensing, computing and communication. They lend themselves to countless applications and at the same time constrained by limited battery life, processing capability, memory and bandwidth which makes it soft target of malicious objects such as virus and worms. We study the potential threat for worm spread in wireless sensor network using epidemic theory. We propose a new model Susceptible- Exposed-Infectious-Quarantine-Recovered with Vaccination (SEIQRS-V), to characterize the dynamics of the worm spread in WSN. Threshold, equilibrium and their stability are discussed. Numerical methods are employed to solve the system of equations and MATLAB is used to simulate the system. The Quarantine is a method of isolating the most infected nodes from the network till they get recovered and the Vaccination is the mechanism to immunize the network temporarily to reduce the spread worms.
Design of compact wideband unequal wilkinson power divider with improved isolation

In this article, a compact unequal, planar Wilkinson power divider with ultra-wideband operation is proposed. The composed power divider having the size of 11.6 mm × 18.5 mm. It consists of one input and two output branches with individual resistive values. Two isolation resistors are used to provide better isolation between the two output ports. The impedance values of each transmission branch and isolation resistors is varied based on the output power division ratio i.e. (P2/P3). The ADS package simulated results of the designed unequal WPD satisfy the operating range (S11 ≤ -10 dB) from 2.5 GHz to 18 GHz and isolation are obtained over the entire frequency of operation.