Miracle-dz/UniFAR-FTUs huggingface dataset:
Application-Aware Design to Enhance System Efficiency for VoIP Services in BWA Networks

This paper has designed a cross-layer framework for voice over Internet protocol (VoIP) services in IEEE 802.16 systems. It uses the application session information of the session description protocol to generate the quality of service parameters in IEEE 802.16 systems. This feature allows the system to efficiently allocate the radio resource because it can exactly estimate the properties of VoIP services such as packet-size and packet-generation-interval. In other words, the cross-layer framework is expected to achieve a novel resource request scheme for a VoIP service that dynamically assigns the radio resource. This paper has analyzed the maximum number of supportable VoIP users for the resource request schemes in terms of the packet-generation-interval in the silent-period, the duration of the silent-period, and the major VoIP speech codec. The numerical results show that the proposed scheme can efficiently support the VoIP services for the various communication environments. Particularly, it can improve the maximum number of supportable VoIP users by 14 ~ 93% compared to an extended real-time polling service.
Visualization of Ca2+ Filling Mechanisms upon Synaptic Inputs in the Endoplasmic Reticulum of Cerebellar Purkinje Cells

The endoplasmic reticulum (ER) plays crucial roles in intracellular Ca2+ signaling, serving as both a source and sink of Ca2+, and regulating a variety of physiological and pathophysiological events in neurons in the brain. However, spatiotemporal Ca2+ dynamics within the ER in central neurons remain to be characterized. In this study, we visualized synaptic activity-dependent ER Ca2+ dynamics in mouse cerebellar Purkinje cells (PCs) using an ER-targeted genetically encoded Ca2+ indicator, G-CEPIA1er. We used brief parallel fiber stimulation to induce a local decrease in the ER luminal Ca2+ concentration ([Ca2+]ER) in dendrites and spines. In this experimental system, the recovery of [Ca2+]ER takes several seconds, and recovery half-time depends on the extent of ER Ca2+ depletion. By combining imaging analysis and numerical simulation, we show that the intraluminal diffusion of Ca2+, rather than Ca2+ reuptake, is the dominant mechanism for the replenishment of the local [Ca2+]ER depletion immediately following the stimulation. In spines, the ER filled almost simultaneously with parent dendrites, suggesting that the ER within the spine neck does not represent a significant barrier to Ca2+ diffusion. Furthermore, we found that repetitive climbing fiber stimulation, which induces cytosolic Ca2+ spikes in PCs, cumulatively increased [Ca2+]ER. These results indicate that the neuronal ER functions both as an intracellular tunnel to redistribute stored Ca2+ within the neurons, and as a leaky integrator of Ca2+ spike-inducing synaptic inputs. SIGNIFICANCE STATEMENT Ca2+ is a key messenger that regulates neuronal functions in the brain. Although the endoplasmic reticulum (ER) plays indispensable roles as a source and sink of Ca2+, technical difficulties have impeded the analysis of Ca2+ dynamics within the ER. In this study, we have used a genetically encoded ER Ca2+ indicator to visualize Ca2+ dynamics within the neuronal ER. We found that Ca2+-mobilizing synaptic inputs locally decreased the ER Ca2+ concentration, followed by Ca2+ replenishment by intraluminal Ca2+ diffusion throughout the ER of dendrites and spines. Furthermore, Ca2+ spike-inducing synaptic inputs cumulatively increased the Ca2+ content of the ER. Thus, our study indicates that the ER functions both as a tunnel to redistribute stored Ca2+ and as a leaky integrator of synaptic inputs.
Dependence of the melting temperature of DNA on salt concentration

Data on the decrease of the DNA melting temperature Tm with the salt concentration M are reported and discussed. The electrostatic free energy change in the helix–coil transition, ΔFe is related to the potential, ψ, which represents the electrostatic repulsion between the phosphate charges; ψ is calculated as a function of M and of the distances between the charges of the two strands. The Debye‐Hückel approximation is shown to overestimate ψ. It is suggested that the high local concentration of the counterions in the immediate vicinity of the fixed charges screen these charges from interacting with other fixed charges, to the extent that the system behaves as if the fixed ions carry a reduced charge. The notion of a reduced charge represents in a single parameter the deviation of the Debye‐Hückel approximation from the true potential. A plot of Tm versus ΔFe gives a straight line as predicted. ΔH0 is calculated from the slope and found to be consistent with experimentally determined values. Our calculations support the hypothesis that the change of Tm with salt concentration is due to changes in the screened interactions between the fixed phosphate charges. In analyzing the results of these calculations, we are able on the one hand to indicate some of the limitations of the theoretical model and, on the other hand, draw some conclusions about the order of magnitude of the nonelectrostatic interaction energy of formation of the double helix.
The cross-cultural nature of the relationship between schizotypy and mixed-handedness

Positive schizotypy is associated with non-right-handedness, which includes left- and mixed-handedness. However, because the underlying mechanisms might be different, it is important to examine whether both left- and mixed-handedness are associated with a high incidence of schizotypy. During 2009–2010, we used both the Perceptual Aberration Scale and Schizotypal Personality Questionnaire to assess 1315 undergraduate students in Taiwan for schizotypy and the Annett handedness questionnaire to assess handedness. Among the three-way classifications based on Annett's grouping, the fully left-handed group appeared to have the lowest score of positive schizotypy; next was the fully right-handed group and then the mixed-handed. Among the three-way classifications driven from cluster analysis, mixed-handers showed highest score of positive schizotypy. When handedness was treated continuously, both direction (e.g., Hand Preference Index) and consistency (e.g., Either hand use score) indicators were significantly correlated with schizotypy. The results of regression analyses showed that the quadratic handedness measure were negatively associated with schizotypy. The results remained similar after correcting for social pressure on left-handedness. In conclusion, the relationship between schizotypy and mixed-handedness appears to be cross-cultural. The dichotomous classification of handedness, right- vs. non-right-handedness, appears to be insufficient. Additional studies on the distinct mechanisms of mixed- and left-handedness are warranted.
Acceptance and Utilization of Technology (UTAUT) as a Method of Technology Acceptance Model of Mitigation Disaster Website

www.mitigasi-bencana.com as a knowledge management website created based on survey results in April-July 2014 in East Java and Central Java provinces, indicates a gap between the expectations and reality that exist in the services provided by the regional disaster management agency. Based on condition analysis, the gaps that occur can be reduced if the community has the understanding and knowledge of adequate disaster mitigation. The problem that arises later is whether the chosen technology solution is appropriate and acceptable to the public? The methodology used in this study using the Technology Acceptance Model development is the Unified Theory of Acceptance and Utilization of Technology (UTAUT). Feedback obtained from respondents KarangTaruna youth SelogedongBantul, www.mitigasi-bencana.com can be accepted by the respondents, but from processed data is obtained only UTAUT hypotheses on the relationship dimension eligible for Social Expectancy on the Attitude toward technology, which means the higher the perception of the Social Expectancy, the higher the perception of the Attitude toward technology. Because www.mitigasi-bencana.com is new socialized so that society still need time to explore content information and knowledge contained therein. To be accepted by user, a knowledge management application must prepare various aspects of Performance Expectancy, Effort Expectancy, Social Factors, Facilitating Conditions and Attitude.
A roadmap for driving customer word-of-mouth

Managers seeking to manage customer word-of-mouth (WOM) behavior need to understand how different attitudinal drivers (e.g. satisfaction, positive and negative emotion, commitment, and self-brand connection) relate to a range of WOM behaviors. They also need to know how the effects of these drivers are moderated by customer characteristics (e.g. gender, age, income, country). The paper aims to discuss these issues. ,To investigate these issues a built a large-scale multi-national database was created that includes attitudinal drivers, customer characteristics, and a full range of WOM behaviors, involving both the sending and receiving of both positive and negative WOM, with both strong and weak ties. The combination of sending-receiving, positive-negative and strong ties-weak ties results in a typology of eight distinct WOM behaviors. The investigation explores the drivers of those behaviors, and their moderators, using a hierarchical Bayes model in which all WOM behaviors are simultaneously modeled. ,Among the many important findings uncovered are: the most effective way to drive all positive WOM behaviors is through maximizing affective commitment and positive emotions; minimizing negative emotions and ensuring that customers are satisfied lowers all negative WOM behaviors; all other attitudinal drivers have lower or even mixed effects on the different WOM behaviors; and customer characteristics can have a surprisingly large impact on how attitudes affect different WOM behaviors. ,These findings have important managerial implications for promotion (which attitudes should be stimulated to produce the desired WOM behavior) and segmentation (how should marketing efforts change, based on segments defined by customer characteristics). ,This research points to the myriad of factors that enhance positive and reduce negative word-of-mouth, and the importance of accounting for customer heterogeneity in assessing the likely impact of attitudinal drivers on word-of-mouth behaviors.
The Parameters of the Ion Flow of Vacuum-Spark Plasma

In this paper, vacuum-spark plasmas with various pulse parameters were investigated. Two types of pulse generator were used to initiate the discharge. The pulse amplitude and duration were varied from 15 to 350 kV and from 100 to 400 ns, respectively. The electrode separation of the vacuum gap was varied from 2 to 15 mm. It has been found that the most probable energies of the ion-flow species increase with gap spacing. In addition, a dependence of the most probable energies of the ion-flow species on ion charge has been revealed.
Evaluation of Hedging Strategies of Asian Options on Electricity at Nord Pool

This thesis empirically evaluates a geometric Brownian motion and a stochastic volatility model for modeling futures prices and hedging Asian call options on the electricity spot price. Estimation of parameters for the models is done based on historical futures prices of futures contracts with a one month delivery period using nonlinear regression and Maximum Likelihood techniques. The models are tested on 2014 data and tracking error for each model is presented. The tracking error is investigated through the median value, the spread between minimum and maximum value along with value at risk at a 95% level.In addition, a third model for modeling spot and futures prices is presented theoretically. It is an exponential additive model with the advantage that it models the future price process from the spot price, instead of modeling the future price process immediately. This bypasses the issue of no information about the future price process during the delivery period, when there is no prices of the futures contracts.The aim of this thesis is to compare the simpler geometric Brownian motion to the more complex stochastic volatility model. It is found that the stochastic volatility model performs better when tested on out-of-sample data. The geometric Brownian motion tends to underestimate the electricity prices, despite that 2014 had low pricest compared to the other years in the data sample. In addition, the approximation of the distribution of the future price process under the geometric Brownian motion model gave a bad fit and led to difficulties when estimating the parameters. The stochastic volatility model produced more stable results and gave a better fit for the distribution.
Next waves in veridical network embedding *

Embedding nodes of a large network into a metric (e.g., Euclidean) space has become an area of active research in statistical machine learning, which has found applications in natural and social sciences. Generally, a representation of a network object is learned in a Euclidean geometry and is then used for subsequent tasks regarding the nodes and/or edges of the network, such as community detection, node classification and link prediction. Network embedding algorithms have been proposed in multiple disciplines, often with domain‐specific notations and details. In addition, different measures and tools have been adopted to evaluate and compare the methods proposed under different settings, often dependent of the downstream tasks. As a result, it is challenging to study these algorithms in the literature systematically. Motivated by the recently proposed PCS framework for Veridical Data Science, we propose a framework for network embedding algorithms and discuss how the principles of predictability, computability, and stability (PCS) apply in this context. The utilization of this framework in network embedding holds the potential to motivate and point to new directions for future research.
An evaluation of the external validity and reliability of a rugby league match simulation protocol

Abstract The aim of this study was to assess the external validity and reliability of a novel rugby league match simulation protocol. With ethical approval, 16 males (age 22.4 ± 7.1 years, estimated 52.1 ± 4.5 ml · kg−1 · min−1) performed the rugby league match simulation protocol on two occasions 10 to 14 days apart. During the rugby league match simulation protocol participants covered a total distance of 8,444 ± 212 m, at an overall locomotive rate of 97.3 ± 2.5 m · min−1. In addition, changes in very high (−22.4%), high (−8.6%) and low intensity (1.6%) running locomotive rates from the first to the fourth quarter were observed. The magnitude of these movement characteristics did not differ significantly (P > 0.05) between repeated trials, with coefficients of variation of 1.1, 4.2 and 10.6%, and 95% limits of agreement of −0.4 ± 4.0, −0.3 ± 3.6, and −0.2 ± 4.4 m · min−1 for overall, high and very high intensity running locomotive rates, respectively. On this evidence, the rugby league match simulation protocol replicates the movement demands observed during elite rugby league matches. Furthermore, the protocol can be performed reliably amongst non-elite sports players and thereby has the potential to be used as a tool for monitoring the effectiveness of various interventions on physical match performance.
Transitional supported housing for mental health consumers enabling personal recovery: Allowing me to be me

ABSTRACT Objective: Safe, secure, affordable housing is recognised as pivotal to supporting mental health recovery. This article aims to evaluate an innovative West Australian transitional supported housing service for mental health consumers. The service offers 12-months accommodation and individually-tailored, recovery-oriented outreach support followed by six months of less intensive support. Method: Informed by the principles of personal recovery and co-production, the research team, consumers and service staff worked together to create a participatory evaluation process. Semi-structured interviews were conducted with consumers (n = 8), family members (n = 3), and staff (n = 5) which focused on the experience and impact of the service. Data were analysed using thematic analysis. Results: Consumers and family members were satisfied with the service, particularly its person-centred and co-produced approach, and the primacy of relationships characterised by power sharing, authenticity and transparency. Having stable accommodation enabled consumers to make positive changes, including engaging in new therapies, developing independence, and pursuing study and work opportunities. When re-interviewed at least three months after leaving the accommodation, consumers reflected that the service had a significant role in facilitating their recovery and were hopeful about their future. Discussion: Housing stability alongside flexible, tailored, recovery-oriented support were central to satisfaction with the service. Challenges in securing stable, affordable housing post-service highlight the broader issue of housing affordability and supply, and highlight the need for more low cost and social housing to promote mental health recovery. As recovery is a unique, individual process, a variety of flexible supported housing options are needed.
Métodos clásicos de resolución de ecuaciones diferenciales ordinarias

Los metodos clasicos para resolver ecuaciones diferenciales son importantes pero dificiles de recordar. Por eso nos planteamos escribir un texto dedicado a ellos con exclusividad, donde se pudiesen encontrar los metodos facilmente. De aqui que este libro no contiene nada de los muchos aspectos fundamentales de la teoria de ecuaciones diferenciales: existencia y unicidad de soluciones, sistemas de ecuaciones, integracion por desarrollos en serie, estabilidad, . , por citar solo unos pocos. Es claro que, matematicamente hablando, no puede plantearse un estudio serio de las ecuaciones diferenciales sin abordar estos temas, pero no es este el objetivo del libro. Los temas que aqui se tratan pueden explicarse a estudiantes de diversas carreras tal como aparecen desarrollados. El libro consta fundamentalmente de tres partes, de acuerdo a una primera clasificacion general de las ecuaciones que se estudian: ecuaciones explicitas de primer orden, ecuaciones en las que la derivada aparece implicitamente y ecuaciones en las que se puede reducir el orden. Cada una de estas partes abarca diversos tipos de ecuaciones.
Definition of the Surface in the Thyroid Hormone Receptor Ligand Binding Domain for Association as Homodimers and Heterodimers with Retinoid X Receptor*

Thyroid hormone receptors (TRs) bind as homodimers or heterodimers with retinoid X receptors (RXRs) to DNA elements with diverse orientations of AGGTCA half-sites. We performed a comprehensive x-ray crystal structure-guided mutation analysis of the TR ligand binding domain (TR LBD) surface to map the functional interface for TR homodimers and heterodimers with RXR in the absence and/or in the presence of DNA. We also identified the molecular contacts in TR LBDs crystallized as dimers. The results show that crystal dimer contacts differ from those found in the functional studies. We found that identical TR LBD residues found in helices 10 and 11 are involved in TR homodimerization and heterodimerization with RXR. Moreover, the same TR LBD surface is operative for dimerization with direct repeats spaced by 4 base pairs (DR-4) and with the inverted palindrome spaced by 6 base pairs (F2), but not with TREpal (unspaced palindrome), where homodimers appear to be simply two monomers binding independently to DNA. We also demonstrate that interactions between the TR and RXR DNA binding domains stabilize TR-RXR heterodimers on DR-4. The dimer interface can be functional in the cell, because disruption of key residues impairs transcriptional activity of TRs mediated through association with RXR LBD linked to GAL4 DNA-binding domain.
Partial power DC-DC converter for large-scale photovoltaic systems

In photovoltaic (PV) systems, a wide variety of power converter topologies and PV configurations have been developed in order to increase the system efficiency. Traditionally, grid-connected PV systems use one or two conversion stages. The single conversion stage is mainly used for large-scale PV systems working with only a DC-AC converter. Whereas, for small and medium-scale, two conversion stages are used. The advantages working with a DC-stage are mainly the distributed maximum power point tracking (MPPT) algorithm and the elevation capability, but it presents a reduced conversion efficiency compared with the single stage configurations. On the other hand, the single conversion stage presents a reduced overall efficiency produced by partial shading. The proposed work presents a Partial Power DC-DC converter (PPC) which process only a portion of the whole power, reducing the conversion losses. It includes the benefits of two stage configurations so that it performs individual MPPT. Besides, due to the modularity of the architecture, it allows the parallel connection of many strings as required to use in large-scale PV systems. Simulations are performed in order to evaluate the converter performance.
Joint Information-Theoretic Secrecy and Covert Communication in the Presence of an Untrusted User and Warden

In this article, we investigate joint information-theoretic secrecy and covert communication in a single-input–multioutput (SIMO) system where a transmitter (Alice) is communicating with two legitimate users (Bob and Carol). We consider that an untrusted user and a warden node are also present in the network attempting to attack the secure and covert communications to Bob and Carol, respectively. Specifically, Bob requires secure communications such that his messages from Alice are not decoded by the untrusted user, while Carol requires covert communications such that her messages from Alice are not detected by the warden. To do so, we consider that Alice transmits Carol’s messages during selected time slots to hide them from the warden while also transmitting Bob’s messages in each time slot contentiously. We formulate an optimization problem with the aim of maximizing the average rate subject to a covert communication requirement and a secure communications constraint. Since the proposed optimization problem is nonconvex, we utilize successive convex approximation to obtain a tractable solution. Moreover, we extend our proposed system model to multiple antenna Alice scenario and find beamforming vectors so that the average sum rate is maximized. Furthermore, we consider practical assumptions that Alice has imperfect knowledge of the warden’s location and imperfect channel state information (CSI) of Bob and Carol. Our numerical examples highlight that the imperfect CSI at Carol has a more detrimental impact on the average rate compared to imperfect CSI at Bob.