Miracle-dz/UniFAR-FTUs huggingface dataset:
Unsteady Rayleigh-Bénard Convection of Nanoliquids in Enclosures

Rayleigh-Bénard convection of a nanoliquid in shallow, square and tall enclosures is studied using the Khanafer-Vafai-Lightstone single-phase model. The thermophysical properties of water, copper, copper-oxide, alumina, silver and titania at 300 K under stagnant conditions that are collected from literature are used in calculating thermophysical properties of water-based nanoliquids. Phenomenological laws and mixture theory are used for calculating thermophysical properties. Free-free, rigid-rigid and rigid-free boundary conditions are considered in the study. Intractable Lorenz model for each boundary combination is derived and then reduced to the tractable Ginzburg-Landau model. The amplitude thus obtained is used to quantify the heat transport in terms of Nusselt number. Addition of nanoparticles is shown not to alter the influence of the nature of boundaries on the onset of convection as well as on heat transport. Amongst the three enclosures considered, it is found that tall and shallow enclosures transport maximum and minimum energy respectively. Enhancement of heat transport due to nanoparticles in the three enclosures is found to be in the range 3% 11%. Comparison of results in the case of rigid-rigid boundaries is made with those of an earlier work and good agreement is found. The study has limitations in the sense that thermophysical properties are calculated by using various quantities modelled for static condition. Keywords—Enclosures, free-free, rigid-rigid and rigid-free boundaries, Ginzburg-Landau model, Lorenz model.
Synthesis and characterization of porous silica and polyaniline-porous silica composite materials with high surface area

Porous silica materials were synthesized from tetraethyl orthosilicate (TEOS) using Pluronic P123 (non-ionic triblock copolymer, EO 20 PO 70 O 20 ) as template under acidic conditions which was then used to prepare polyaniline (PAni) and porous silica composites (PAnisilica) at a fixed molar ratio. These materials were characterized by nitrogen adsorption-desorption isotherm measured by Barrett-Joyner- Halenda (BJH) method and pore size distribution from desorption branch and surface area measured by the Brunauer-Emmett-Teller (BET) method, scanning electron microscopy (SEM), transmission electron microscopy (TEM), TEM-energy dispersive X-ray (EDX) and Fourier transform infrared (FT-IR) spectroscopy. The composite maintains its structure even after the polymerization and the polymer is dispersed on the inorganic matrix. The rod-like porous silica was about 1μm to 1.5 μm long and on an average the diameter was in the range of 300- 500 nm. The SEM and TEM images show well ordered 2d hexagonal pore, high specific surface area (850 m 2 g -1 ) and uniform pore size of ca . 6.5 nm in diameter. After incorporation of PAni inside the silica pore, framework of porous silica did not collapse and the surface area of the composite was as high as 434 m 2 g -1 which was 5.5 time higher than our previous report of 78.3 m 2 g -1 . Due to shrinkage of the framework during the incorporation of aniline inside the silica, the pore diameter slightly increase to 7.5 nm but still showing Type IV isotherm and typical hysteresis loop H1 implying a uniform cylindrical pore geometry. DOI: http://dx.doi. org/10.3329/bjsir.v49i1. 18847 Bangladesh J. Sci. Ind. Res. 49(1) , 1-8, 2014
The Effect of Habitat on Density, Feeding Behaviour and Activity of Heller’s Vervet Monkey ( Chlorocebus pygerythrus arenarius ): A Case Study in Arba Minch Forest, Ethiopia

Heller’s vervet monkey (Chlorocebus pygerythrus arenarius) is one of the African savannah monkeys found in East Africa including Ethiopia. This study was carried out from September 2012 to April 2013 to provide data on the effect of habitat on density, feeding and activity of the Heller’s vervet monkey in Nech Sar National Park and its adjacent areas, in Ethiopia. The study area constituted underground water forest, riverine forest, savannah bushland, bush with Eucalyptus plantation and tree dominated bushland. Five line transects of 3-4 km were made in all habitats to estimate the population density of Heller’s vervet monkey. Five selected troops were also followed using focal animal sampling to study the activity patterns and feeding behaviour. The highest population density of Heller’s vervet monkey was recorded in underground water forest and riverine forest habitats. The overall diet composition of Heller’s vervet monkey was dominated by leaves, which accounted for 37.87%. Foraging on bark, fruit and flowers constituted 21.19%, 19.56% and 13.90%, respectively. They also fed on shoots (4.70%) and unknown food items (2.78%). The activity in different troops showed significant variations in resting behaviour, whereas active behaviours did not show significant variations between the troops.
The resistance experiments: Morality, authority and obedience in Stanley Milgram's account

The paper seeks to re‐conceptualize Stanley Milgram's (in)famous experiments on willing obedience by drawing solely on Milgram's own contemporary account. It identifies a substantial incongruence between the findings Milgram presented (i.e., his description of the experiments) and the meaning he imputed to them (i.e., his interpretation of the exper iments). It argues that instead of operationalizing the concepts he claimed to operationalize – legitimate authority, embodied morality and willing obedience –, Milgram's description suggests that the operative forces in the experiments were an illegitimate authority and acts which in effect collude with that authority. As a result, the paper concludes that what the experimental findings represented was not so much obedience out of choice, but out of coercion. Thus, the paper seeks to redirect the conceptual‐moral focus of the findings from the participants who “shockingly” obeyed to those who managed to resist the coercive force of the total experimental situation.
Statement : Transitions of Geometries and Groups

My research concerns the study of transitions between different homogeneous spaces, G/H, associated with a fixed Lie group, G, obtained by taking limits of conjugates of the subgroup H. The idea of geometric transition may be studied from the perspectives of geometry, topology, algebraic geometry, and dynamics. For example: • How does one geometry transition to another at infinity? • What are the possible cusps at infinity on a manifold? • In the Chabauty topology on the space of all subgroups of a group, under what conditions does one group limit to another? • What properties characterize limits of the diagonal subgroup of the general linear group? I also study Dessin d’Enfant, graphs which describe branched coverings of Riemann surfaces. If the covering is Galois, the ramification type is regular. We characterize when small changes to regular ramification types are realizable.
Colony Structure of the Social Snapping Shrimp Synalpheus Filidigitus in Belize

Several species of sponge-dwelling alpheid shrimps (Synalpheus) exhibit unusual colony organizations reminiscent of those found in social insects, but few of these shrimp species have been studied in detail. We sampled colonies of S. filidigitus from its two main hosts, the sponges Oceanapia sp. and Xestospongia spp. , at Carrie Bow Cay, Belize. Colonies contained all size classes of shrimp, from recent hatchlings to mature, brooding females. The majority of colonies consisted of <30 individuals, although a few reached much greater numbers (maximum = 94 in Oceanapia and 121 in Xestospongia). In all but one of the colonies sampled containing mature female(s), only a single female (the "queen") was present. Distinct cohorts of juveniles, apparently produced by the resident female, were recognizable in several colonies, and the total number of individuals in the colony was strongly correlated with the resident female's size and fecundity. These observations suggest that, as previously shown for the eusocial S. regalis, the colony is a close-kin group consisting mainly of the queen's philopatric offspring. Comparison of females from a range in colony sizes revealed an apparent ontogenetic transformation in the queen's morphology. Although smaller (presumably younger) females were morphologically similar to males, queens from larger colonies were considerably larger than males, had proportionally longer and wider abdomens, and had the massive major chela of the first pereiopod replaced with a small chela identical to the normal minor first chela. Colonies of S. filidigitus are similar in organization to those of S. regalis, suggesting that S. filidigitus may be eusocial according to the traditional definition. This brings to 3 the number of species of Synalpheus reported to exhibit this paradoxical social organization.
The effect of electron Coulomb collisions on the incoherent scatter spectrum in the F region at Jicamarca

The fact that the incoherent backscatter spectrum narrows when the radar beam is nearly perpendicular to the magnetic field is well known and has been used at Jicamarca for more than 30 years to measure very accurate line-of-sight velocities. Recently it has become clear that these spectra are narrower than expected. We have explained this effect and also the small change to the spectral shape required at somewhat larger angles to correct the ratio of electron to ion temperature seen in some studies. Coulomb collisions affecting the motion of the electrons are responsible for the additional spectral narrowing. We have carried out very accurate simulations of electron motion resulting in incoherent scatter spectra which are qualitatively similar to spectra resulting from other types of collisions, and to those predicted in an analytic solution for the Coulomb case [Woodman, 1967]. However, we found that the spectrum of the velocity time series in the radar line of sight departs significantly from the nearly Lorentzian form expected with simple collisional models. This causes the collisional effects to extend to somewhat shorter scale lengths, or further from perpendicular to the magnetic field than expected. In order to investigate the collisional process more closely, we performed another simulation combining the effects of electron-ion collisions and a simple friction model (Langevin equation) in an adjustable combination. This one showed that the effect of electron-ion collisions alone would result in collisional effects extending several degrees farther from perpendicular to the field than when both kinds of collisions are included. Collisions affecting the speed of the electrons tend to limit the size of the effect at larger angles from perpendicular. Thus the effect of these collisions on the incoherent scatter spectrum cannot be accurately predicted from simple models but depends on the detailed physics of the collisions.
Control of black foot disease in grapevine nurseries

Black foot disease of grapevines is a decline and dieback disease caused by a soilborne pathogen complex including Cylindrocarpon liriodendri, C. macrodidymum, Campylocarpon fasciculare and Campyl. pseudofasciculare. These pathogens cause primary infections of roots and basal ends of grafted cuttings in nursery soils. Thirteen fungicides were screened in vitro for mycelial inhibition of these pathogens. Prochloraz manganese chloride, benomyl, flusilazole and imazalil were the most effective fungicides tested, and were subsequently included in semi-commercial field trials. Basal ends of grafted cuttings were dipped in various chemical and biological treatments prior to planting in open-rooted nurseries. Black foot pathogens were not isolated from grafted cuttings prior to planting. Additional treatments involved soil amendments with Trichoderma formulations and hot water treatment of dormant nursery grapevines. Field trials were evaluated after eight months. Isolations from uprooted plants revealed low levels of black foot pathogens in the roots of untreated control plants, and significantly higher levels in basal ends of rootstocks. The incidence of black foot pathogens, as well as that of Petri disease pathogens, was not significantly and/or consistently reduced by the majority of chemical or biological treatments. However, these pathogens were not isolated from uprooted plants that were subjected to hot water treatment. It is therefore recommended that hot water treatment of dormant nursery plants be included in an integrated strategy for the proactive management of these diseases in grapevine nurseries.
draft of 5-11-2018 Self-encrypting deception : weaknesses in the encryption of solid state drives ( SSDs )

We have analyzed the hardware full-disk encryption of several SSDs by reverse engineering their firmware. In theory, the security guarantees offered by hardware encryption are similar to or better than software implementations. In reality, we found that many hardware implementations have critical security weaknesses, for many models allowing for complete recovery of the data without knowledge of any secret. BitLocker, the encryption software built into Microsoft Windows will rely exclusively on hardware full-disk encryption if the SSD advertises supported for it. Thus, for these drives, data protected by BitLocker is also compromised. This challenges the view that hardware encryption is preferable over software encryption. We conclude that one should not rely solely on hardware encryption offered by SSDs.
Synchronization Phenomena in Two Chaotic Circuits Coupled with Memristors and a Resister

Shinriki-Mori circuit [1], which is one of the chaos circuits, have been studied by many researchers. Some of them reported about coupled chaotic circuits. In these system, various kinds of interesting phenomena related to chaotic synchronization phenomena [2]-[4] are observed. On the other hand, a memrister is investigated by researchers who are focusing on chaotic circuits. Gambuzza and et al. [5] investigated memristors as coupling elements in chaotic circuits. They proposed a model which two memristor are coupled in anti-parallel and investigated the model as a coupling element of two chaos circuits. However, the coupling strength has not changed. In this study, a coupling element which consists of two memristors and a resister is proposed. By applying to two ShinrikiMori circuit, relationship between synchronization phenomena and a coupling strength of the model is investigated.
Determinants of job satisfaction and turnover intentions of public employees: evidence from US federal agencies

The purpose of this study is to probe the main determinants of job satisfaction (JS) and turnover intention (TI) in the public sector, as identified in the relevant literature: goal congruence, intrinsic and extrinsic work motivation, and interpersonal trust. Drawing on Simon’s two-factor theory, as well as employing a systematic conceptual and empirical model, this research analyzes two dimensions of TI among public employees (conflictual TI and developmental TI) to identify important antecedents and mediating conditions (pull factors and push factors) of TI. Large data sets from the Merit Principles Survey (MPS) are used to develop an ‘antecedent-mediator-outcome’ model that empirically analyzes and tests the direct and indirect effects of a set of attitudinal and behavioral influences on JS and two types of TI within US federal agencies. The research finds that certain predictors and mediators play major roles in meaningfully diminishing the levels of conflictual TI and developmental TI while significantly boosting JS. Based on a discussion of the main findings, research and practical implications for public management theory and practice are provided.
Parametric Adaptive Matched Filter and its Modified Version

Abstract : The parametric adaptive matched filter (PAMF) for space-time adaptive processing (STAP) has been an interesting research area in the airborne radar data processing community over the last decade. Starting from providing a complete formulation of PAMF, this report assesses the performance of PAMF using simulated data as well as real airborne data collected by the Multi-channel Airborne Radar Measurements (MCARM) system with use of results from the conventional STAP as a benchmark. A modified PAMF approach using both forward and backward predictions is proposed to eliminate the dimensionality loss of the method. Finally the operational counts and computational savings of PAMF are also estimated.
Substitution rates in α‐helical transmembrane proteins

It has been shown previously that some membrane proteins have a conserved core of amino acid residues. This idea not only serves to orient helices during model building exercises but may also provide insight into the structural role of residues mediating helix–helix interactions. Using experimentally determined high‐resolution structures of α‐helical transmembrane proteins we show that, of the residues within the hydrophobic transmembrane spans, the residues at lipid and subunit interfaces are more evolutionarily variable than those within the lipid‐inaccessible core of a polypeptide's transmembrane domain. This supports the idea that helix–helix interactions within the same polypeptide chain and those at the interface between different polypeptide chains may arise in distinct ways. To show this, we use a new method to estimate the substitution rate of an amino acid residue given an alignment and phylogenetic tree of closely related proteins. This method gives better sensitivity in the otherwise‐conserved transmembrane domains than a conventional similarity analysis and is relatively insensitive to the sequences used.
A Block Enumeration Technique for Lattice Basis Reduction

We present a technique that yields algorithms for computing (nearly) optimally reduced lattice bases with respect to a wide class of basis quality measures. Namely, we get algorithms for computing lattice bases with minimum orthogonality defect, bases with minimum GramSchmidt decay, Babai-optimal bases, and bases with (1 + ε)-approximately minimum Seysen condition number. These algorithms are all slight variations of the same technique, and all run in polynomial time for lattices of fixed rank. To the best of our knowledge, these are the first algorithms for any of these problems to beat the naive approach, which requires exponential time in the bit length of the input. The technique works by breaking a lattice into pieces according to large gaps in its successive minima, enumerating bases for each of these pieces, and then lifting the bases for each piece to a basis of the whole lattice. This technique may be of independent interest.
University of California, Los Angeles

Incumbents in accordance with standardized procedures conduct in-depth interviews with patients and/or family, construct comprehensive medical histories, perform initial and periodic physical examinations, evaluate patient behavior and explore patient's interpretation of health needs. Incumbents directly perform or order appropriate diagnostic studies and interpret finished results; develop and implement long and short range treatment plans. Nurse Practitioners work in collaboration with other health care team members, consulting and referring as appropriate, but retain responsibility for the ongoing clinical management of the patient.
Building resilience and character in young people Alcohol and Drug Prevention Briefing Paper

This briefing paper looks at resilience in the context of universal educational settings (both formal and informal). By giving definitions of key terms to provide a better understanding, it will then explore ways in which these can be contextualised and translated into practice. In so doing, it will highlight the role of schools and other educational (formal or informal) institutions and how they can contribute to the development of resilience in children and young people.
Mobile Face Recognization

We created a mobile based system for detecting faces within a picture and matching these faces to a precompiled database. Face detection is done using a Haar cascade, and face recognization is done using a combination of Fisherfaces and PCA analysis, also known as Eigenfaces. The system shows promising performance and processes images quickly even on a mobile platform.
Finite Control Set Model Predictive Control applied to a Nested NPC to Increase the number of Output Levels

This paper proposes a new 5-level voltage source converter for medium voltage (MV) and high power applications. The proposed converter can operate over a wide range of voltages with fewer number of power switches and components compared to the available 5-level power converters. Using a 4-level Nested Neutral Point Clamped and the Model Predictive Control strategy, it is possible to achieve a 5-level power converter without changes in the topology of the 4-level power converter. The performance of the proposed converter is verified by simulations.
Density fluctuations and field mixing in the critical fluid

The authors develop a finite-size-scaling theory describing the joint density and energy fluctuations in a near-critical fluid. As a result of the mixing of the temperature and chemical potential in the two relevant scaling fields, the energy operator features in the critical density distribution as an antisymmetric correction to the limiting scale-invariant form. Both the limiting form and the correction are predicted to be functions that are characteristic of the Ising universality class and are independently known. The theory is tested with extensive Monte Carlo studies of the two-dimensional Lennard-Jones fluid, within the grand canonical ensemble. The simulations and scaling framework together are shown to provide a powerful way of identifying the location of the liquid-gas critical point, while confirming and clarifying its essentially Ising character. The simulations also show a clearly identifiable signature of the field-mixing responsible for the failure of the law of rectilinear diameter.
The Roles of Food Odorants and Diet in Larval Development of Drosophila melanogaster

Resource assessment via sensory information has been shown to have internal effects on physiology as well as more noticeable behavioral effects. Specifically, the regulation of longevity and fecundity in Drosophila melanogaster adults is connected to diet restriction and olfactory sensing of nutrient availability. The effects of this food odorant/diet restriction response on the development of D. melanogaster larvae have never been tested, despite the possibility that nutrient availability, and, therefore, nutrient sensing, may be more important to this developmental stage than to an emerged adult fly. This study was performed to determine the effects of diet restriction and food odorants on the time and success of pupation and emergence in D. melanogaster. Equal numbers of eggs from two lines of flies, a mutant for the olfactory receptor gene Or83b and a control with the same genetic background, were exposed to four treatments of normal diet or restricted diet with or without yeast odorants. It was found that genotype and diet, but not odorant exposure, had a great impact on larval development.