Miracle-dz/UniFAR-FTUs huggingface dataset:
Reversible phase changes in Ge-Au nanoparticles

We demonstrate a reversible phase transition in nanoparticles composed of a binary eutectic alloy, Ge–Au. The structure, 9 nm diameter nanoparticles embedded in silica, can be switched from bilobe to mixed using a 30 ns ultraviolet laser pulse. The structure can be switched back to bilobe by heating at 80 °C. The bilobe/mixed switching can be performed on the same sample at least ten times. Synchrotron X-ray diffraction studies reveal that the bilobe structure contains crystalline Ge and Au while the mixed structure consists of crystalline Ge and β Ge–Au.
A Vector Valued Multivariate Hazard Rate - II.

Abstract : A new definition of multivariate hazard rate as a vector is proposed. Some general properties consequent on the new definition are derived. Definition of multivariate increasing (decreasing) hazard rate, IHR (DHR), distributed are proposed on this basis. Specific examples of application of the new definition are given for the cases of multivariate Pareto, multinormal, Morganstern-Gumbel-Farlie distributions. Some numerical values are given for bivariate normal distributions with positive correlation. (Author)
Instability of a two-dimensional viscous flow in an annulus with permeable walls to two-dimensional perturbations

The stability of a two-dimensional viscous flow in an annulus with permeable walls with respect to small two-dimensional perturbations is studied. The basic steady flow is the most general rotationally invariant solution of the Navier-Stokes equations in which the velocity has both radial and azimuthal components, and the azimuthal velocity profile depends on the radial Reynolds number. It is shown that for a wide range of parameters of the problem, the basic flow is unstable to small two-dimensional perturbations. Neutral curves in the space of parameters of the problem are computed. Calculations show that the stability properties of this flow are determined by the azimuthal velocity at the inner cylinder when the direction of the radial flow is from the inner cylinder to the outer one and by the azimuthal velocity at the outer cylinder when the direction of the radial flow is reversed. This work is a continuation of our previous study of an inviscid instability in flows between rotating porous cylinders [K. Ilin and A. Morgulis, “Instability of an inviscid flow between porous cylinders with radial flow,” J. Fluid Mech. 730, 364–378 (2013)].
Neuroscience Research Instruments Used in Neuromarketing

In the field of neuroscience, there is a multitude of research instruments of the human brain which make neuronal mechanisms identification possible. This research is setting its objective to identify which are the main neuronal research tools and to see which is the level of their applicability in fields like neuroscience and neuromarketing. Starting from the concept that a neuronal research instrument can offer an advantage in a marketing campaign, a set of specific objectives has been created: identifying the main research tools in neuroscience (SO1); the applicability of these tools in neuromarketing research (SO2). These specific objectives have the mission to confirm or refute some working hypotheses which have the purpose to determine the importance of using these tools: the efficiency of marketing campaigns is higher by using these tools (H1); neuromarketing campaigns are more efficient when they are realized in a controlled environment (H2). Neuroscience is a vast and captivating study field, with many implications for both researchers and marketers. For sure it has provided a great understanding of how marketing campaigns should be created, but also how to understand consumer behavior, needs, and attitudes of individuals. During this research, it is now clearer than ever that neuroscience instruments are the core of not only future neuronal research but present ones too.
Numerical simulations of the decay of satellite galaxy orbits

A multiple three-body technique is used to study the orbital evolution of satellite galaxies which is similar to the N-body method but neglects two-body forces between stars in the halo of the parent galaxy. It is found that, for satellites orbiting within the halo, Chandrasekhar's (1960) dynamical friction formula accurately describes the orbital decay rate, including its variation with satellite mass and size and with the number density and mass of halo stars. Significant frictional forces are present even outside the halo, and the orbital decay rate, instead of depending on the procedure used to place the satellite in its orbit, is determined only by the current orbital parameters. This semirestricted N-body method is sufficiently fast to have permitted the running of 200 simulations to date, many more than would have been possible by means of the conventional N-body technique.
Examining the Relationship between Aspects of Human Capital Management and Employee Job Performance: Mediating Role of Employee Engagement and Moderating Role of Perceived Organizational Support

This paper examined the effect of the selected aspects of human capital management on employee job performance and the mediating role of employee engagement. Likewise, this study tested the moderation role of perceived organizational support on the HCM-employee performance link. The research sample is the responses of 426 participants from twelve banking organizations operating in Addis Ababa, Ethiopia, utilizing the social exchange theory and the theory of the resource-based view. This paper is structured quantitatively, with stratified and simple random sampling techniques. The research model analysis method applies structural equation modeling with AMOS to test the hypothesized relationships. The results showed that the Human Capital Management (HCM) practices, namely knowledge accessibility, learning capacity, workforce optimization, leadership practice, and career advancement, positively related to employee job performance. Moreover, the bias-corrected bootstrapping iteration revealed that employee engagement partially mediates this relationship between aspects of human capital management and employee job performance. The findings also show that perceived organizational support positively moderates the association between knowledge accessibility, learning capacity, leadership practice, career advancement, and employee job performance. Conversely, it has an insignificant moderation effect on the association between workforce optimization and employee job performance. Finally, the limitations and future research implications are discussed.
Transcriptome and biochemical analysis pinpoint multi-layered molecular processes associated with iron deficiency tolerance in hexaploid wheat

Iron (Fe) is an essential nutrient for plants that is indispensable for many physiological activities. Although few genotypes were identified with contrasting tolerance to Fe deficiency, the molecular insight into the distinct biochemical and transcriptional responses determining the trait is poorly known. This study aimed to identify the molecular and biochemical basis for the contrasting Fe deficiency tolerance in wheat genotype showing tolerance to Fe deficiency (cv. Kanchan-KAN) compared to susceptible (cv. PBW343-PBW) cultivar. Under Fe deficiency, the KAN show delayed chlorosis, high SPAD values and low malondialdehyde activity compared to PBW. The shoot transcriptomics studies show that a large set of genes for photosynthetic pathways were highly induced in PBW, suggesting its sensitivity to Fe deficiency. Although, under Fe deficiency, both the cultivars show distinct molecular re-arrangements, including high expression of genes involved in Fe uptake (including membrane transporters) and mobilization, the gene expression level was higher in KAN. Furthermore, the KAN cultivar also shows high ubiquitination activity in the shoot tissue suggesting a high turnover of proteins in the tolerant cultivar. These observations were also co-related with the high root phytosiderophores biosynthesis and its release that contributes to the enhanced Fe translocation index in KAN. Overall, our work provides the key link to understanding the mechanistic insight for the Fe deficiency tolerance in hexaploid wheat. This will enable wheat breeders to select genotypes for better Fe use efficiency for agriculture.
Rasch Analysis of The Indonesian Version of Individual Work Performance Questionnaire (IWPQ)

The Individual Work Performance Questionnaire was developed by Koopmans et al. (2013). This questionnaire was based on the construct of individual work performance which consists of task performance, contextual performance, and counterproductive work behavior. Widyastuti & Hidayat (2018) adapted the IWPQ into Bahasa Indonesia. The mentioned research used the classical test theory (CTT) approach to validate the instrument. Therefore, the findings were only applicable to the study’s sample, as validity and reliability could not be legitimately generalized to other study settings. In comparison, the development of the original IWPQ used Rasch analysis to examine its measurement properties. Rasch analysis is a modern psychometric approach based on item response theory (IRT), which has several advantages over the CTT. This study aimed to validate the psychometric properties of the Indonesian Version of IWPQ using the Rasch model. The psychometric properties discussed in this study include instrument reliability, person and item reliability, unidimensionality, rating scale functioning, and bias detection (Differential Item Functioning). The 213 participants in this research survey were Indonesian citizens aged 18-46 years old (mean = 30.64, SD = 8.55) and were actively working for at least three months at their current job. The result showed that the assumption of the unidimensionality of each sub-scale of IWPQ was fulfilled. The 5-Likert rating scales of this instrument had adequate functionality. The person reliability for all sub-scales ranged from . 58 - . 80. Meanwhile, the item reliability ranged from . 90 - . 97. The separations were considered high with a value ranging from 3.04 – 5.77. All items in this instrument functioned well to measure individual work performance except for one item in sub-scale Contextual Performance. This specific item should be revised to achieve a more accurate measurement of the construct. There was one item that was considered biased toward gender in sub-scale Contextual Performance. Also, there was one item that was considered biased toward tenure in sub-scale Counterproductive Work Behavior. These findings had implications for using the Indonesian Version of IWPQ to assess employees’ individual work performance and recommendations for future research.
Compositional Model Checking of Partially Ordered State Spaces

Symbolic trajectory evaluation (STE)--a model checking technique based on partial order representations of state spaces--has been shown to be an effective model checking technique for large circuit models. However, the temporal logic that it supports is restricted, and as with all verification techniques has significant performance limitations. The demand for verifying larger circuits, and the need for greater expressiveness requires that both these problems be examined. The thesis develops a suitable logical framework for model checking partially ordered state spaces: the temporal logic TL and its associated satisfaction relations, based on the quaternary logic ${\cal Q}. $ TL is appropriate for expressing the truth of propositions about partially ordered state spaces, and has suitable technical properties that allow STE to support a richer temporal logic. Using this framework, verification conditions called assertions are defined, a generalised version of STE is developed, and three STE-based algorithms are proposed for investigation. Advantages of this style of proof include: models of time are incorporated; circuits can be described at a low level; and correctness properties are expressed at a relatively high level. A primary contribution of the thesis is the development of a compositional theory for TL assertions. This compositional theory is supported by the partial order representation of state space. To show the practical use of the compositional theory, two prototype verification systems were constructed, integrating theorem proving and STE. Data is manipulated efficiently by using binary decision diagrams as well as symbolic data representation methods. Simple heuristics and a flexible interface reduce the human cost of verification. Experiments were undertaken using these prototypes, including verifying two circuits from the IFIP WG 10.5 Benchmark suite. These experiments showed that the generalised STE algorithms were effective, and that through the use of the compositional theory it is possible to verify very large circuits completely, including detailed timing properties.
Mean field theory of the nonlinear response of an interacting dipolar system with rotational diffusion to an oscillating field

A mean field theory of dipolar relaxation in a system of interacting dipoles is developed on the basis of a local field picture. The distribution of orientations of a selected dipole is assumed to satisfy a rotational diffusion equation of Smoluchowski type with time-dependent potential determined self-consistently from the mean dipole moment. The response to an oscillating Maxwell field acting in a volume element is studied for arbitrary amplitude and frequency of the field. For weak field the theory is similar to that developed by Debye, who used the Lorentz local field factor, and derived an expression for the frequency-dependent susceptibility of Clausius–Mossotti form. In the present theory the local field factor is found from the static linear response in thermal equilibrium. The same local field factor is used for strong field. Then the mean dipole moment oscillates anharmonically, and the maximum absorption shifts to higher frequency.
Effects of Parallel Processing Implementation on Balanced Load-Division Depending on Distributed Memory Systems

: Complex problems need long time to be solved, with low efficiency and performance. Therefore, to overcome these drawbacks, the studies went toward the approaches of breaking the problem into independent parts, and treating each part individually in the way that each processing element can execute its part of the problem simultaneously with the others.Parallel processors are computer systems that consist of multiple processing units connected via some interconnection network and the software needed to make the processing units work together. Parallel processing is divided into three types; Shared, Distributed and Hybrid memory systems.In this paper, distributed memory systems addressed depending on client/servers principles, the network can contain any number of nodes; one of them is a client and the others are servers. The algorithms used here are capable of calculating the (Started, Terminated, Consumed -CPU and Total Execution- times and CPU usage) of servers and the Client's -CPU and total execution- times. This work addresses an improved approach for problem subdivision in balanced form and design flexible algorithms to communicate efficiently between client-side and servers-side in the way to overcome the problems of hardware networking components and message passing problems. We addressed Matrix-Algebra case-study to display the effect of balance load-division for this approach. The obtained results are checked and monitored by special programming-checking-subroutines through many testing-iterations and proved a high degree of accuracy. All of these algorithms implemented using Java Language.
Finding Hidden Cliques of Size in Nearly Linear Time

Consider an Erdös–Renyi random graph in which each edge is present independently with probability 1/2, except for a subset CN of the vertices that form a clique (a completely connected subgraph). We consider the problem of identifying the clique, given a realization of such a random graph. The algorithm of Dekel et al. (ANALCO. SIAM, pp 67–75, 2011) provably identifies the clique CN in linear time, provided |CN | ≥ 1.261 √ N . Spectral methods can be shown to fail on cliques smaller than √ N . In this paperwe describe a nearly linear-time algorithm that succeeds with high probability for |CN | ≥ (1 + ε)√N/e for any ε > 0. This is the first algorithm that provably improves over spectral methods. We further generalize the hidden clique problem to other background graphs (the standard case corresponding to the complete graph on N vertices). For large-girth regular graphs of degree (Δ+1) we prove that so-called local algorithms succeed if |CN | ≥ (1 + ε)N/ √ eΔ and fail if |CN | ≤ (1− ε)N/ √ eΔ.
Modeling of TRPV4-C1-mediated calcium signaling in vascular endothelial cells induced by fluid shear stress and ATP

The calcium signaling plays a vital role in flowdependent vascular endothelial cell (VEC)physiology.Variations in fluid shear stress andATP concentration in blood vessels can activate dynamic responses of cytosolic-free Ca2+ through various calcium channels on the plasma membrane. In this paper, a novel dynamic model has been proposed for transient receptor potential vanilloid 4 (TRPV4)-C1mediated intracellular calcium dynamics in VECs induced by fluid shear stress and ATP. Our model includes Ca2+ signaling pathways through P2Y receptors and P2X4 Ca2+ channels (indirect mechanism) and captures the roles of the TRPV4-C1 compound channels in VEC Ca2+ signaling in response to fluid shear stress (direct mechanism). In particular, it takes into account that the TRPV4-C1 compound channels are regulated by intracellular Ca2+ and IP3 concentrations. The simulation studies have demonstrated that the dynamic responses of calcium concentration produced by the proposedmodel correlatewell with the existing experimental observations. We also conclude from the simulation studies that endogenously released ATP may play an insignificant role in the process of intracellular Ca2+ response to shear stress.
Reversibility and stochastic networks

This paper considers the M/M/k queueing system where a line is being formed in front of each server. Arriving customers join the shorter line and switch to another once the latter becomes shorter. Since the expected waiting time equals that in the first come first served case (FCFS), it is of interest to compute the variance of the waiting time. We compute it explicitly for the cases where k = 1, k = 2, k = 3 and for the case of a random queue. For the case k ≥ 4, we express the variance in terms of the roots of a k-degree polynomial.
No-Wait Lot-Streaming Flow Shop Scheduling

Lot-streaming is the process of splitting a job (lot) into a number of smaller sublots to allow the overlapping of operations between successive machines in a multi-stage production system. A new genetic algorithm (NGA) is proposed for minimizing the mean weighted absolute deviation of job completion times from due dates when jobs are scheduled in a no-wait lot-streaming flow shop. In a no-wait flow shop, each sublot must be processed continuously from its start in the first machine to its completion in the last machine without any interruption on machines and without any waiting in between the machines. NGA replaces selection and mating operators of genetic algorithms (GAs), which often lead to premature convergence, by new operators (marriage and pregnancy operators) and adopts the idea of inter-chromosomal dominance. The performance of NGA is compared with that of GA and the results of computational experiments show that NGA works well for this type of problem.
NMR investigation of Fischer-Tropsch waxes. II. Hard wax

For pt.I see J.A. J. Lourens and E.C. Reynhardt, ibid., vol.12, p.1963 (1970). The proton spin-lattice relaxation time and the liquid content of polycrystalline hard wax, average chain length m=50 carbon atoms and chain length disorder Delta m=15.7, were determined as a function of temperature (385>T>118K). In the low-temperature phase (T 308K) is dominated by the gradual melting of the crystalline phase of the wax. Linear relationships exist between the percentage liquid in the wax and the specific volume and thermal conductivity of the wax. The thermogram of the wax is discussed in terms of the melting process of the wax and the effect of this process on the average chain length and chain length disorder.
A New Piecewise Rational Reparameterization Method

A new piecewise rational re-parameterization of a polynomial curve is presented. The method relies on a parametric polygonal decomposition method. With the proposed piecewise rational re-parameterization method, the optimal parameterization can be reached, and the optimal parameterizations asymptotic convergence to the arc-length parameterization is analyzed. Computing instances demonstrates the efficiency of the proposed method.
Accumulate-Repeat-Delay-Partial-Delay Codes

Inspired by Accumulate-Repeat-Accumulate (ARA) codes, in this letter we propose a new channel coding scheme called Accumulate-Repeat-Delay-Partial-Delay (ARDPD) codes. Contrary to ARA codes, ARDPD codes simultaneously achieve good threshold and linear minimum distance. Based on EXIT for LDPC codes, we show that for maximum variable node degree 5, the threshold of ARDPD codes outperforms the best known unstructured irregular LDPC codes. Iterative decoding simulation results show that the proposed codes perform as predicted.
Propagation of oblique waves over small bottom undulation in an ice-covered two-layer fluid

Scattering of oblique incident waves by small bottom undulation in a two-layer fluid, where the upper layer has a thin ice-cover while the lower one has the undulation, is investigated within the framework of linearized water wave theory. The ice-cover is being modeled as an elastic plate of very small thickness. There exist two modes of time-harmonic waves–one with lower wave number propagating along the ice-cover (ice-cover mode) and the other with higher wave number along the interface (interfacial mode). A perturbation analysis is employed to solve the corresponding boundary value problem governed by modified Helmholtz equation and thereby evaluating the reflection and transmission coefficients approximately up to first order for both modes. A patch of sinusoidal ripples, having two different wave numbers over two consecutive stretches, is considered as an example and the related coefficients are determined. It is observed that when the wave is incident on the ice-cover surface we always find energy transfer to the interface, but for interfacial incident waves there are parameter ranges for which no energy transfer to the ice-cover surface is possible. Also it is observed that for small angles of incidence, the reflected energy is more as compared to the other angles of incidence. These results are demonstrated in graphical form. From the derived results, the solutions for problems with free surface can be obtained as particular cases.